1436 lines
37 KiB
C
1436 lines
37 KiB
C
/*
|
||
* tclWinConsole.c --
|
||
*
|
||
* This file implements the Windows-specific console functions, and the
|
||
* "console" channel driver.
|
||
*
|
||
* Copyright (c) 1999 by Scriptics Corp.
|
||
*
|
||
* See the file "license.terms" for information on usage and redistribution of
|
||
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||
*/
|
||
|
||
#include "tclWinInt.h"
|
||
|
||
/*
|
||
* The following variable is used to tell whether this module has been
|
||
* initialized.
|
||
*/
|
||
|
||
static int initialized = 0;
|
||
|
||
/*
|
||
* The consoleMutex locks around access to the initialized variable, and it is
|
||
* used to protect background threads from being terminated while they are
|
||
* using APIs that hold locks.
|
||
*/
|
||
|
||
TCL_DECLARE_MUTEX(consoleMutex)
|
||
|
||
/*
|
||
* Bit masks used in the flags field of the ConsoleInfo structure below.
|
||
*/
|
||
|
||
#define CONSOLE_PENDING (1<<0) /* Message is pending in the queue. */
|
||
#define CONSOLE_ASYNC (1<<1) /* Channel is non-blocking. */
|
||
|
||
/*
|
||
* Bit masks used in the sharedFlags field of the ConsoleInfo structure below.
|
||
*/
|
||
|
||
#define CONSOLE_EOF (1<<2) /* Console has reached EOF. */
|
||
#define CONSOLE_BUFFERED (1<<3) /* Data was read into a buffer by the reader
|
||
* thread. */
|
||
|
||
#define CONSOLE_BUFFER_SIZE (8*1024)
|
||
|
||
/*
|
||
* Structure containing handles associated with one of the special console
|
||
* threads.
|
||
*/
|
||
|
||
typedef struct ConsoleThreadInfo {
|
||
HANDLE thread; /* Handle to reader or writer thread. */
|
||
HANDLE readyEvent; /* Manual-reset event to signal _to_ the main
|
||
* thread when the worker thread has finished
|
||
* waiting for its normal work to happen. */
|
||
TclPipeThreadInfo *TI; /* Thread info structure of writer and reader. */
|
||
} ConsoleThreadInfo;
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||
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||
/*
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||
* This structure describes per-instance data for a console based channel.
|
||
*/
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||
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||
typedef struct ConsoleInfo {
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||
HANDLE handle;
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||
int type;
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||
struct ConsoleInfo *nextPtr;/* Pointer to next registered console. */
|
||
Tcl_Channel channel; /* Pointer to channel structure. */
|
||
int validMask; /* OR'ed combination of TCL_READABLE,
|
||
* TCL_WRITABLE, or TCL_EXCEPTION: indicates
|
||
* which operations are valid on the file. */
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||
int watchMask; /* OR'ed combination of TCL_READABLE,
|
||
* TCL_WRITABLE, or TCL_EXCEPTION: indicates
|
||
* which events should be reported. */
|
||
int flags; /* State flags, see above for a list. */
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||
Tcl_ThreadId threadId; /* Thread to which events should be reported.
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||
* This value is used by the reader/writer
|
||
* threads. */
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||
ConsoleThreadInfo writer; /* A specialized thread for handling
|
||
* asynchronous writes to the console; the
|
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* waiting starts when a control event is sent,
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||
* and a reset event is sent back to the main
|
||
* thread when the write is done. */
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||
ConsoleThreadInfo reader; /* A specialized thread for handling
|
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* asynchronous reads from the console; the
|
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* waiting starts when a control event is sent,
|
||
* and a reset event is sent back to the main
|
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* thread when input is available. */
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DWORD writeError; /* An error caused by the last background
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* write. Set to 0 if no error has been
|
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* detected. This word is shared with the
|
||
* writer thread so access must be
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||
* synchronized with the writable object. */
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||
char *writeBuf; /* Current background output buffer. Access is
|
||
* synchronized with the writable object. */
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||
int writeBufLen; /* Size of write buffer. Access is
|
||
* synchronized with the writable object. */
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||
int toWrite; /* Current amount to be written. Access is
|
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* synchronized with the writable object. */
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int readFlags; /* Flags that are shared with the reader
|
||
* thread. Access is synchronized with the
|
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* readable object. */
|
||
int bytesRead; /* Number of bytes in the buffer. */
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||
int offset; /* Number of bytes read out of the buffer. */
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char buffer[CONSOLE_BUFFER_SIZE];
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||
/* Data consumed by reader thread. */
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||
} ConsoleInfo;
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||
|
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typedef struct ThreadSpecificData {
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||
/*
|
||
* The following pointer refers to the head of the list of consoles that
|
||
* are being watched for file events.
|
||
*/
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||
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||
ConsoleInfo *firstConsolePtr;
|
||
} ThreadSpecificData;
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||
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||
static Tcl_ThreadDataKey dataKey;
|
||
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||
/*
|
||
* The following structure is what is added to the Tcl event queue when
|
||
* console events are generated.
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*/
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||
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typedef struct ConsoleEvent {
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||
Tcl_Event header; /* Information that is standard for all
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||
* events. */
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||
ConsoleInfo *infoPtr; /* Pointer to console info structure. Note
|
||
* that we still have to verify that the
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||
* console exists before dereferencing this
|
||
* pointer. */
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||
} ConsoleEvent;
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||
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||
/*
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||
* Declarations for functions used only in this file.
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||
*/
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||
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static int ConsoleBlockModeProc(ClientData instanceData,
|
||
int mode);
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||
static void ConsoleCheckProc(ClientData clientData, int flags);
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||
static int ConsoleCloseProc(ClientData instanceData,
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||
Tcl_Interp *interp);
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||
static int ConsoleClose2Proc(ClientData instanceData,
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||
Tcl_Interp *interp, int flags);
|
||
static int ConsoleEventProc(Tcl_Event *evPtr, int flags);
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||
static void ConsoleExitHandler(ClientData clientData);
|
||
static int ConsoleGetHandleProc(ClientData instanceData,
|
||
int direction, ClientData *handlePtr);
|
||
static void ConsoleInit(void);
|
||
static int ConsoleInputProc(ClientData instanceData, char *buf,
|
||
int toRead, int *errorCode);
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||
static int ConsoleOutputProc(ClientData instanceData,
|
||
const char *buf, int toWrite, int *errorCode);
|
||
static DWORD WINAPI ConsoleReaderThread(LPVOID arg);
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static void ConsoleSetupProc(ClientData clientData, int flags);
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static void ConsoleWatchProc(ClientData instanceData, int mask);
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||
static DWORD WINAPI ConsoleWriterThread(LPVOID arg);
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||
static void ProcExitHandler(ClientData clientData);
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||
static int WaitForRead(ConsoleInfo *infoPtr, int blocking);
|
||
static void ConsoleThreadActionProc(ClientData instanceData,
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||
int action);
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||
static BOOL ReadConsoleBytes(HANDLE hConsole, LPVOID lpBuffer,
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DWORD nbytes, LPDWORD nbytesread);
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static BOOL WriteConsoleBytes(HANDLE hConsole,
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||
const void *lpBuffer, DWORD nbytes,
|
||
LPDWORD nbyteswritten);
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||
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/*
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* This structure describes the channel type structure for command console
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* based IO.
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||
*/
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||
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static const Tcl_ChannelType consoleChannelType = {
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||
"console", /* Type name. */
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||
TCL_CHANNEL_VERSION_5, /* v5 channel */
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ConsoleCloseProc, /* Close proc. */
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||
ConsoleInputProc, /* Input proc. */
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||
ConsoleOutputProc, /* Output proc. */
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||
NULL, /* Seek proc. */
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||
NULL, /* Set option proc. */
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||
NULL, /* Get option proc. */
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||
ConsoleWatchProc, /* Set up notifier to watch the channel. */
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||
ConsoleGetHandleProc, /* Get an OS handle from channel. */
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||
ConsoleClose2Proc, /* close2proc. */
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||
ConsoleBlockModeProc, /* Set blocking or non-blocking mode. */
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NULL, /* Flush proc. */
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||
NULL, /* Handler proc. */
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||
NULL, /* Wide seek proc. */
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||
ConsoleThreadActionProc, /* Thread action proc. */
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||
NULL /* Truncation proc. */
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||
};
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||
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||
/*
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||
*----------------------------------------------------------------------
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||
*
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||
* ReadConsoleBytes, WriteConsoleBytes --
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||
*
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||
* Wrapper for ReadConsoleW, that takes and returns number of bytes
|
||
* instead of number of WCHARS.
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||
*
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||
*----------------------------------------------------------------------
|
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*/
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||
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static BOOL
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ReadConsoleBytes(
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HANDLE hConsole,
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LPVOID lpBuffer,
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||
DWORD nbytes,
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||
LPDWORD nbytesread)
|
||
{
|
||
DWORD ntchars;
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||
BOOL result;
|
||
|
||
/*
|
||
* If user types a Ctrl-Break or Ctrl-C, ReadConsole will return
|
||
* success with ntchars == 0 and GetLastError() will be
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||
* ERROR_OPERATION_ABORTED. We do not want to treat this case
|
||
* as EOF so we will loop around again. If no Ctrl signal handlers
|
||
* have been established, the default signal OS handler in a separate
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* thread will terminate the program. If a Ctrl signal handler
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||
* has been established (through an extension for example), it
|
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* will run and take whatever action it deems appropriate.
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||
*/
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do {
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||
result = ReadConsoleW(hConsole, lpBuffer, nbytes / sizeof(WCHAR), &ntchars,
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||
NULL);
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} while (result && ntchars == 0 && GetLastError() == ERROR_OPERATION_ABORTED);
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||
if (nbytesread != NULL) {
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||
*nbytesread = ntchars * sizeof(WCHAR);
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||
}
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return result;
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||
}
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||
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static BOOL
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WriteConsoleBytes(
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||
HANDLE hConsole,
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||
const void *lpBuffer,
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DWORD nbytes,
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LPDWORD nbyteswritten)
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{
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||
DWORD ntchars;
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||
BOOL result;
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||
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||
result = WriteConsoleW(hConsole, lpBuffer, nbytes / sizeof(WCHAR), &ntchars,
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NULL);
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if (nbyteswritten != NULL) {
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||
*nbyteswritten = ntchars * sizeof(WCHAR);
|
||
}
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||
return result;
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||
}
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||
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||
/*
|
||
*----------------------------------------------------------------------
|
||
*
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||
* ConsoleInit --
|
||
*
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||
* This function initializes the static variables for this file.
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||
*
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||
* Results:
|
||
* None.
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||
*
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||
* Side effects:
|
||
* Creates a new event source.
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||
*
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||
*----------------------------------------------------------------------
|
||
*/
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||
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static void
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||
ConsoleInit(void)
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||
{
|
||
/*
|
||
* Check the initialized flag first, then check again in the mutex. This
|
||
* is a speed enhancement.
|
||
*/
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||
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if (!initialized) {
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||
Tcl_MutexLock(&consoleMutex);
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||
if (!initialized) {
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||
initialized = 1;
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||
Tcl_CreateExitHandler(ProcExitHandler, NULL);
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}
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Tcl_MutexUnlock(&consoleMutex);
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||
}
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||
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if (TclThreadDataKeyGet(&dataKey) == NULL) {
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||
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
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||
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tsdPtr->firstConsolePtr = NULL;
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||
Tcl_CreateEventSource(ConsoleSetupProc, ConsoleCheckProc, NULL);
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||
Tcl_CreateThreadExitHandler(ConsoleExitHandler, NULL);
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||
}
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||
}
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||
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||
/*
|
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*----------------------------------------------------------------------
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||
*
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||
* ConsoleExitHandler --
|
||
*
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* This function is called to cleanup the console module before Tcl is
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* unloaded.
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*
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* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
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||
* Removes the console event source.
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||
*
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*----------------------------------------------------------------------
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*/
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||
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static void
|
||
ConsoleExitHandler(
|
||
ClientData clientData) /* Old window proc. */
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||
{
|
||
Tcl_DeleteEventSource(ConsoleSetupProc, ConsoleCheckProc, NULL);
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}
|
||
|
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/*
|
||
*----------------------------------------------------------------------
|
||
*
|
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* ProcExitHandler --
|
||
*
|
||
* This function is called to cleanup the process list before Tcl is
|
||
* unloaded.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Resets the process list.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ProcExitHandler(
|
||
ClientData clientData) /* Old window proc. */
|
||
{
|
||
Tcl_MutexLock(&consoleMutex);
|
||
initialized = 0;
|
||
Tcl_MutexUnlock(&consoleMutex);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleSetupProc --
|
||
*
|
||
* This procedure is invoked before Tcl_DoOneEvent blocks waiting for an
|
||
* event.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Adjusts the block time if needed.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
ConsoleSetupProc(
|
||
ClientData data, /* Not used. */
|
||
int flags) /* Event flags as passed to Tcl_DoOneEvent. */
|
||
{
|
||
ConsoleInfo *infoPtr;
|
||
Tcl_Time blockTime = { 0, 0 };
|
||
int block = 1;
|
||
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
|
||
|
||
if (!(flags & TCL_FILE_EVENTS)) {
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Look to see if any events are already pending. If they are, poll.
|
||
*/
|
||
|
||
for (infoPtr = tsdPtr->firstConsolePtr; infoPtr != NULL;
|
||
infoPtr = infoPtr->nextPtr) {
|
||
if (infoPtr->watchMask & TCL_WRITABLE) {
|
||
if (WaitForSingleObject(infoPtr->writer.readyEvent,
|
||
0) != WAIT_TIMEOUT) {
|
||
block = 0;
|
||
}
|
||
}
|
||
if (infoPtr->watchMask & TCL_READABLE) {
|
||
if (WaitForRead(infoPtr, 0) >= 0) {
|
||
block = 0;
|
||
}
|
||
}
|
||
}
|
||
if (!block) {
|
||
Tcl_SetMaxBlockTime(&blockTime);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleCheckProc --
|
||
*
|
||
* This procedure is called by Tcl_DoOneEvent to check the console event
|
||
* source for events.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* May queue an event.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ConsoleCheckProc(
|
||
ClientData data, /* Not used. */
|
||
int flags) /* Event flags as passed to Tcl_DoOneEvent. */
|
||
{
|
||
ConsoleInfo *infoPtr;
|
||
int needEvent;
|
||
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
|
||
|
||
if (!(flags & TCL_FILE_EVENTS)) {
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Queue events for any ready consoles that don't already have events
|
||
* queued.
|
||
*/
|
||
|
||
for (infoPtr = tsdPtr->firstConsolePtr; infoPtr != NULL;
|
||
infoPtr = infoPtr->nextPtr) {
|
||
if (infoPtr->flags & CONSOLE_PENDING) {
|
||
continue;
|
||
}
|
||
|
||
/*
|
||
* Queue an event if the console is signaled for reading or writing.
|
||
*/
|
||
|
||
needEvent = 0;
|
||
if (infoPtr->watchMask & TCL_WRITABLE) {
|
||
if (WaitForSingleObject(infoPtr->writer.readyEvent,
|
||
0) != WAIT_TIMEOUT) {
|
||
needEvent = 1;
|
||
}
|
||
}
|
||
|
||
if (infoPtr->watchMask & TCL_READABLE) {
|
||
if (WaitForRead(infoPtr, 0) >= 0) {
|
||
needEvent = 1;
|
||
}
|
||
}
|
||
|
||
if (needEvent) {
|
||
ConsoleEvent *evPtr = ckalloc(sizeof(ConsoleEvent));
|
||
|
||
infoPtr->flags |= CONSOLE_PENDING;
|
||
evPtr->header.proc = ConsoleEventProc;
|
||
evPtr->infoPtr = infoPtr;
|
||
Tcl_QueueEvent((Tcl_Event *) evPtr, TCL_QUEUE_TAIL);
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleBlockModeProc --
|
||
*
|
||
* Set blocking or non-blocking mode on channel.
|
||
*
|
||
* Results:
|
||
* 0 if successful, errno when failed.
|
||
*
|
||
* Side effects:
|
||
* Sets the device into blocking or non-blocking mode.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ConsoleBlockModeProc(
|
||
ClientData instanceData, /* Instance data for channel. */
|
||
int mode) /* TCL_MODE_BLOCKING or
|
||
* TCL_MODE_NONBLOCKING. */
|
||
{
|
||
ConsoleInfo *infoPtr = instanceData;
|
||
|
||
/*
|
||
* Consoles on Windows can not be switched between blocking and
|
||
* nonblocking, hence we have to emulate the behavior. This is done in the
|
||
* input function by checking against a bit in the state. We set or unset
|
||
* the bit here to cause the input function to emulate the correct
|
||
* behavior.
|
||
*/
|
||
|
||
if (mode == TCL_MODE_NONBLOCKING) {
|
||
infoPtr->flags |= CONSOLE_ASYNC;
|
||
} else {
|
||
infoPtr->flags &= ~CONSOLE_ASYNC;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleCloseProc/ConsoleClose2Proc --
|
||
*
|
||
* Closes a console based IO channel.
|
||
*
|
||
* Results:
|
||
* 0 on success, errno otherwise.
|
||
*
|
||
* Side effects:
|
||
* Closes the physical channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ConsoleCloseProc(
|
||
ClientData instanceData, /* Pointer to ConsoleInfo structure. */
|
||
Tcl_Interp *interp) /* For error reporting. */
|
||
{
|
||
ConsoleInfo *consolePtr = instanceData;
|
||
int errorCode = 0;
|
||
ConsoleInfo *infoPtr, **nextPtrPtr;
|
||
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
|
||
|
||
/*
|
||
* Clean up the background thread if necessary. Note that this must be
|
||
* done before we can close the file, since the thread may be blocking
|
||
* trying to read from the console.
|
||
*/
|
||
|
||
if (consolePtr->reader.thread) {
|
||
TclPipeThreadStop(&consolePtr->reader.TI, consolePtr->reader.thread);
|
||
CloseHandle(consolePtr->reader.thread);
|
||
CloseHandle(consolePtr->reader.readyEvent);
|
||
consolePtr->reader.thread = NULL;
|
||
}
|
||
consolePtr->validMask &= ~TCL_READABLE;
|
||
|
||
/*
|
||
* Wait for the writer thread to finish the current buffer, then terminate
|
||
* the thread and close the handles. If the channel is nonblocking, there
|
||
* should be no pending write operations.
|
||
*/
|
||
|
||
if (consolePtr->writer.thread) {
|
||
if (consolePtr->toWrite) {
|
||
/*
|
||
* We only need to wait if there is something to write. This may
|
||
* prevent infinite wait on exit. [Python Bug 216289]
|
||
*/
|
||
|
||
WaitForSingleObject(consolePtr->writer.readyEvent, 5000);
|
||
}
|
||
|
||
TclPipeThreadStop(&consolePtr->writer.TI, consolePtr->writer.thread);
|
||
CloseHandle(consolePtr->writer.thread);
|
||
CloseHandle(consolePtr->writer.readyEvent);
|
||
consolePtr->writer.thread = NULL;
|
||
}
|
||
consolePtr->validMask &= ~TCL_WRITABLE;
|
||
|
||
/*
|
||
* Don't close the Win32 handle if the handle is a standard channel during
|
||
* the thread exit process. Otherwise, one thread may kill the stdio of
|
||
* another.
|
||
*/
|
||
|
||
if (!TclInThreadExit()
|
||
|| ((GetStdHandle(STD_INPUT_HANDLE) != consolePtr->handle)
|
||
&& (GetStdHandle(STD_OUTPUT_HANDLE) != consolePtr->handle)
|
||
&& (GetStdHandle(STD_ERROR_HANDLE) != consolePtr->handle))) {
|
||
if (CloseHandle(consolePtr->handle) == FALSE) {
|
||
TclWinConvertError(GetLastError());
|
||
errorCode = errno;
|
||
}
|
||
}
|
||
|
||
consolePtr->watchMask &= consolePtr->validMask;
|
||
|
||
/*
|
||
* Remove the file from the list of watched files.
|
||
*/
|
||
|
||
for (nextPtrPtr = &(tsdPtr->firstConsolePtr), infoPtr = *nextPtrPtr;
|
||
infoPtr != NULL;
|
||
nextPtrPtr = &infoPtr->nextPtr, infoPtr = *nextPtrPtr) {
|
||
if (infoPtr == (ConsoleInfo *) consolePtr) {
|
||
*nextPtrPtr = infoPtr->nextPtr;
|
||
break;
|
||
}
|
||
}
|
||
if (consolePtr->writeBuf != NULL) {
|
||
ckfree(consolePtr->writeBuf);
|
||
consolePtr->writeBuf = 0;
|
||
}
|
||
ckfree(consolePtr);
|
||
|
||
return errorCode;
|
||
}
|
||
|
||
static int
|
||
ConsoleClose2Proc(
|
||
ClientData instanceData, /* Pointer to ConsoleInfo structure. */
|
||
Tcl_Interp *interp, /* For error reporting. */
|
||
int flags)
|
||
{
|
||
if ((flags & (TCL_CLOSE_READ | TCL_CLOSE_WRITE)) == 0) {
|
||
return ConsoleCloseProc(instanceData, interp);
|
||
}
|
||
return EINVAL;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleInputProc --
|
||
*
|
||
* Reads input from the IO channel into the buffer given. Returns count
|
||
* of how many bytes were actually read, and an error indication.
|
||
*
|
||
* Results:
|
||
* A count of how many bytes were read is returned and an error
|
||
* indication is returned in an output argument.
|
||
*
|
||
* Side effects:
|
||
* Reads input from the actual channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ConsoleInputProc(
|
||
ClientData instanceData, /* Console state. */
|
||
char *buf, /* Where to store data read. */
|
||
int bufSize, /* How much space is available in the
|
||
* buffer? */
|
||
int *errorCode) /* Where to store error code. */
|
||
{
|
||
ConsoleInfo *infoPtr = instanceData;
|
||
DWORD count, bytesRead = 0;
|
||
int result;
|
||
|
||
*errorCode = 0;
|
||
|
||
/*
|
||
* Synchronize with the reader thread.
|
||
*/
|
||
|
||
result = WaitForRead(infoPtr, (infoPtr->flags & CONSOLE_ASYNC) ? 0 : 1);
|
||
|
||
/*
|
||
* If an error occurred, return immediately.
|
||
*/
|
||
|
||
if (result == -1) {
|
||
*errorCode = errno;
|
||
return -1;
|
||
}
|
||
|
||
if (infoPtr->readFlags & CONSOLE_BUFFERED) {
|
||
/*
|
||
* Data is stored in the buffer.
|
||
*/
|
||
|
||
if (bufSize < (infoPtr->bytesRead - infoPtr->offset)) {
|
||
memcpy(buf, &infoPtr->buffer[infoPtr->offset], bufSize);
|
||
bytesRead = bufSize;
|
||
infoPtr->offset += bufSize;
|
||
} else {
|
||
memcpy(buf, &infoPtr->buffer[infoPtr->offset], bufSize);
|
||
bytesRead = infoPtr->bytesRead - infoPtr->offset;
|
||
|
||
/*
|
||
* Reset the buffer.
|
||
*/
|
||
|
||
infoPtr->readFlags &= ~CONSOLE_BUFFERED;
|
||
infoPtr->offset = 0;
|
||
}
|
||
|
||
return bytesRead;
|
||
}
|
||
|
||
/*
|
||
* Attempt to read bufSize bytes. The read will return immediately if
|
||
* there is any data available. Otherwise it will block until at least one
|
||
* byte is available or an EOF occurs.
|
||
*/
|
||
|
||
if (ReadConsoleBytes(infoPtr->handle, (LPVOID) buf, (DWORD) bufSize,
|
||
&count) == TRUE) {
|
||
/*
|
||
* TODO: This potentially writes beyond the limits specified
|
||
* by the caller. In practice this is harmless, since all writes
|
||
* are into ChannelBuffers, and those have padding, but still
|
||
* ought to remove this, unless some Windows wizard can give
|
||
* a reason not to.
|
||
*/
|
||
buf[count] = '\0';
|
||
return count;
|
||
}
|
||
|
||
return -1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleOutputProc --
|
||
*
|
||
* Writes the given output on the IO channel. Returns count of how many
|
||
* characters were actually written, and an error indication.
|
||
*
|
||
* Results:
|
||
* A count of how many characters were written is returned and an error
|
||
* indication is returned in an output argument.
|
||
*
|
||
* Side effects:
|
||
* Writes output on the actual channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ConsoleOutputProc(
|
||
ClientData instanceData, /* Console state. */
|
||
const char *buf, /* The data buffer. */
|
||
int toWrite, /* How many bytes to write? */
|
||
int *errorCode) /* Where to store error code. */
|
||
{
|
||
ConsoleInfo *infoPtr = instanceData;
|
||
ConsoleThreadInfo *threadInfo = &infoPtr->writer;
|
||
DWORD bytesWritten, timeout;
|
||
|
||
*errorCode = 0;
|
||
|
||
/* avoid blocking if pipe-thread exited */
|
||
timeout = (infoPtr->flags & CONSOLE_ASYNC) || !TclPipeThreadIsAlive(&threadInfo->TI)
|
||
|| TclInExit() || TclInThreadExit() ? 0 : INFINITE;
|
||
if (WaitForSingleObject(threadInfo->readyEvent, timeout) == WAIT_TIMEOUT) {
|
||
/*
|
||
* The writer thread is blocked waiting for a write to complete and
|
||
* the channel is in non-blocking mode.
|
||
*/
|
||
|
||
errno = EWOULDBLOCK;
|
||
goto error;
|
||
}
|
||
|
||
/*
|
||
* Check for a background error on the last write.
|
||
*/
|
||
|
||
if (infoPtr->writeError) {
|
||
TclWinConvertError(infoPtr->writeError);
|
||
infoPtr->writeError = 0;
|
||
goto error;
|
||
}
|
||
|
||
if (infoPtr->flags & CONSOLE_ASYNC) {
|
||
/*
|
||
* The console is non-blocking, so copy the data into the output
|
||
* buffer and restart the writer thread.
|
||
*/
|
||
|
||
if (toWrite > infoPtr->writeBufLen) {
|
||
/*
|
||
* Reallocate the buffer to be large enough to hold the data.
|
||
*/
|
||
|
||
if (infoPtr->writeBuf) {
|
||
ckfree(infoPtr->writeBuf);
|
||
}
|
||
infoPtr->writeBufLen = toWrite;
|
||
infoPtr->writeBuf = ckalloc(toWrite);
|
||
}
|
||
memcpy(infoPtr->writeBuf, buf, toWrite);
|
||
infoPtr->toWrite = toWrite;
|
||
ResetEvent(threadInfo->readyEvent);
|
||
TclPipeThreadSignal(&threadInfo->TI);
|
||
bytesWritten = toWrite;
|
||
} else {
|
||
/*
|
||
* In the blocking case, just try to write the buffer directly. This
|
||
* avoids an unnecessary copy.
|
||
*/
|
||
|
||
if (WriteConsoleBytes(infoPtr->handle, buf, (DWORD) toWrite,
|
||
&bytesWritten) == FALSE) {
|
||
TclWinConvertError(GetLastError());
|
||
goto error;
|
||
}
|
||
}
|
||
return bytesWritten;
|
||
|
||
error:
|
||
*errorCode = errno;
|
||
return -1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleEventProc --
|
||
*
|
||
* This function is invoked by Tcl_ServiceEvent when a file event reaches
|
||
* the front of the event queue. This procedure invokes Tcl_NotifyChannel
|
||
* on the console.
|
||
*
|
||
* Results:
|
||
* Returns 1 if the event was handled, meaning it should be removed from
|
||
* the queue. Returns 0 if the event was not handled, meaning it should
|
||
* stay on the queue. The only time the event isn't handled is if the
|
||
* TCL_FILE_EVENTS flag bit isn't set.
|
||
*
|
||
* Side effects:
|
||
* Whatever the notifier callback does.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ConsoleEventProc(
|
||
Tcl_Event *evPtr, /* Event to service. */
|
||
int flags) /* Flags that indicate what events to handle,
|
||
* such as TCL_FILE_EVENTS. */
|
||
{
|
||
ConsoleEvent *consoleEvPtr = (ConsoleEvent *) evPtr;
|
||
ConsoleInfo *infoPtr;
|
||
int mask;
|
||
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
|
||
|
||
if (!(flags & TCL_FILE_EVENTS)) {
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Search through the list of watched consoles for the one whose handle
|
||
* matches the event. We do this rather than simply dereferencing the
|
||
* handle in the event so that consoles can be deleted while the event is
|
||
* in the queue.
|
||
*/
|
||
|
||
for (infoPtr = tsdPtr->firstConsolePtr; infoPtr != NULL;
|
||
infoPtr = infoPtr->nextPtr) {
|
||
if (consoleEvPtr->infoPtr == infoPtr) {
|
||
infoPtr->flags &= ~CONSOLE_PENDING;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Remove stale events.
|
||
*/
|
||
|
||
if (!infoPtr) {
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
* Check to see if the console is readable. Note that we can't tell if a
|
||
* console is writable, so we always report it as being writable unless we
|
||
* have detected EOF.
|
||
*/
|
||
|
||
mask = 0;
|
||
if (infoPtr->watchMask & TCL_WRITABLE) {
|
||
if (WaitForSingleObject(infoPtr->writer.readyEvent,
|
||
0) != WAIT_TIMEOUT) {
|
||
mask = TCL_WRITABLE;
|
||
}
|
||
}
|
||
|
||
if (infoPtr->watchMask & TCL_READABLE) {
|
||
if (WaitForRead(infoPtr, 0) >= 0) {
|
||
if (infoPtr->readFlags & CONSOLE_EOF) {
|
||
mask = TCL_READABLE;
|
||
} else {
|
||
mask |= TCL_READABLE;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Inform the channel of the events.
|
||
*/
|
||
|
||
Tcl_NotifyChannel(infoPtr->channel, infoPtr->watchMask & mask);
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleWatchProc --
|
||
*
|
||
* Called by the notifier to set up to watch for events on this channel.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ConsoleWatchProc(
|
||
ClientData instanceData, /* Console state. */
|
||
int mask) /* What events to watch for, OR-ed combination
|
||
* of TCL_READABLE, TCL_WRITABLE and
|
||
* TCL_EXCEPTION. */
|
||
{
|
||
ConsoleInfo **nextPtrPtr, *ptr;
|
||
ConsoleInfo *infoPtr = instanceData;
|
||
int oldMask = infoPtr->watchMask;
|
||
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
|
||
|
||
/*
|
||
* Since most of the work is handled by the background threads, we just
|
||
* need to update the watchMask and then force the notifier to poll once.
|
||
*/
|
||
|
||
infoPtr->watchMask = mask & infoPtr->validMask;
|
||
if (infoPtr->watchMask) {
|
||
Tcl_Time blockTime = { 0, 0 };
|
||
|
||
if (!oldMask) {
|
||
infoPtr->nextPtr = tsdPtr->firstConsolePtr;
|
||
tsdPtr->firstConsolePtr = infoPtr;
|
||
}
|
||
Tcl_SetMaxBlockTime(&blockTime);
|
||
} else if (oldMask) {
|
||
/*
|
||
* Remove the console from the list of watched consoles.
|
||
*/
|
||
|
||
for (nextPtrPtr = &(tsdPtr->firstConsolePtr), ptr = *nextPtrPtr;
|
||
ptr != NULL;
|
||
nextPtrPtr = &ptr->nextPtr, ptr = *nextPtrPtr) {
|
||
if (infoPtr == ptr) {
|
||
*nextPtrPtr = ptr->nextPtr;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleGetHandleProc --
|
||
*
|
||
* Called from Tcl_GetChannelHandle to retrieve OS handles from inside a
|
||
* command consoleline based channel.
|
||
*
|
||
* Results:
|
||
* Returns TCL_OK with the fd in handlePtr, or TCL_ERROR if there is no
|
||
* handle for the specified direction.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ConsoleGetHandleProc(
|
||
ClientData instanceData, /* The console state. */
|
||
int direction, /* TCL_READABLE or TCL_WRITABLE. */
|
||
ClientData *handlePtr) /* Where to store the handle. */
|
||
{
|
||
ConsoleInfo *infoPtr = instanceData;
|
||
|
||
*handlePtr = infoPtr->handle;
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* WaitForRead --
|
||
*
|
||
* Wait until some data is available, the console is at EOF or the reader
|
||
* thread is blocked waiting for data (if the channel is in non-blocking
|
||
* mode).
|
||
*
|
||
* Results:
|
||
* Returns 1 if console is readable. Returns 0 if there is no data on the
|
||
* console, but there is buffered data. Returns -1 if an error occurred.
|
||
* If an error occurred, the threads may not be synchronized.
|
||
*
|
||
* Side effects:
|
||
* Updates the shared state flags. If no error occurred, the reader
|
||
* thread is blocked waiting for a signal from the main thread.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
WaitForRead(
|
||
ConsoleInfo *infoPtr, /* Console state. */
|
||
int blocking) /* Indicates whether call should be blocking
|
||
* or not. */
|
||
{
|
||
DWORD timeout, count;
|
||
HANDLE *handle = infoPtr->handle;
|
||
ConsoleThreadInfo *threadInfo = &infoPtr->reader;
|
||
INPUT_RECORD input;
|
||
|
||
while (1) {
|
||
/*
|
||
* Synchronize with the reader thread.
|
||
*/
|
||
|
||
/* avoid blocking if pipe-thread exited */
|
||
timeout = (!blocking || !TclPipeThreadIsAlive(&threadInfo->TI)
|
||
|| TclInExit() || TclInThreadExit()) ? 0 : INFINITE;
|
||
if (WaitForSingleObject(threadInfo->readyEvent, timeout) == WAIT_TIMEOUT) {
|
||
/*
|
||
* The reader thread is blocked waiting for data and the channel
|
||
* is in non-blocking mode.
|
||
*/
|
||
|
||
errno = EWOULDBLOCK;
|
||
return -1;
|
||
}
|
||
|
||
/*
|
||
* At this point, the two threads are synchronized, so it is safe to
|
||
* access shared state.
|
||
*/
|
||
|
||
/*
|
||
* If the console has hit EOF, it is always readable.
|
||
*/
|
||
|
||
if (infoPtr->readFlags & CONSOLE_EOF) {
|
||
return 1;
|
||
}
|
||
|
||
if (PeekConsoleInputW(handle, &input, 1, &count) == FALSE) {
|
||
/*
|
||
* Check to see if the peek failed because of EOF.
|
||
*/
|
||
|
||
TclWinConvertError(GetLastError());
|
||
|
||
if (errno == EOF) {
|
||
infoPtr->readFlags |= CONSOLE_EOF;
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
* Ignore errors if there is data in the buffer.
|
||
*/
|
||
|
||
if (infoPtr->readFlags & CONSOLE_BUFFERED) {
|
||
return 0;
|
||
} else {
|
||
return -1;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* If there is data in the buffer, the console must be readable (since
|
||
* it is a line-oriented device).
|
||
*/
|
||
|
||
if (infoPtr->readFlags & CONSOLE_BUFFERED) {
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
* There wasn't any data available, so reset the thread and try again.
|
||
*/
|
||
|
||
ResetEvent(threadInfo->readyEvent);
|
||
TclPipeThreadSignal(&threadInfo->TI);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleReaderThread --
|
||
*
|
||
* This function runs in a separate thread and waits for input to become
|
||
* available on a console.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Signals the main thread when input become available. May cause the
|
||
* main thread to wake up by posting a message. May one line from the
|
||
* console for each wait operation.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static DWORD WINAPI
|
||
ConsoleReaderThread(
|
||
LPVOID arg)
|
||
{
|
||
TclPipeThreadInfo *pipeTI = (TclPipeThreadInfo *)arg;
|
||
ConsoleInfo *infoPtr = NULL; /* access info only after success init/wait */
|
||
HANDLE *handle = NULL;
|
||
ConsoleThreadInfo *threadInfo = NULL;
|
||
int done = 0;
|
||
|
||
while (!done) {
|
||
/*
|
||
* Wait for the main thread to signal before attempting to read.
|
||
*/
|
||
|
||
if (!TclPipeThreadWaitForSignal(&pipeTI)) {
|
||
/* exit */
|
||
break;
|
||
}
|
||
if (!infoPtr) {
|
||
infoPtr = (ConsoleInfo *)pipeTI->clientData;
|
||
handle = infoPtr->handle;
|
||
threadInfo = &infoPtr->reader;
|
||
}
|
||
|
||
|
||
/*
|
||
* Look for data on the console, but first ignore any events that are
|
||
* not KEY_EVENTs.
|
||
*/
|
||
|
||
if (ReadConsoleBytes(handle, infoPtr->buffer, CONSOLE_BUFFER_SIZE,
|
||
(LPDWORD) &infoPtr->bytesRead) != FALSE) {
|
||
/*
|
||
* Data was stored in the buffer.
|
||
*/
|
||
|
||
infoPtr->readFlags |= CONSOLE_BUFFERED;
|
||
} else {
|
||
DWORD err = GetLastError();
|
||
|
||
if (err == (DWORD) EOF) {
|
||
infoPtr->readFlags = CONSOLE_EOF;
|
||
}
|
||
done = 1;
|
||
}
|
||
|
||
/*
|
||
* Signal the main thread by signalling the readable event and then
|
||
* waking up the notifier thread.
|
||
*/
|
||
|
||
SetEvent(threadInfo->readyEvent);
|
||
|
||
/*
|
||
* Alert the foreground thread. Note that we need to treat this like a
|
||
* critical section so the foreground thread does not terminate this
|
||
* thread while we are holding a mutex in the notifier code.
|
||
*/
|
||
|
||
Tcl_MutexLock(&consoleMutex);
|
||
if (infoPtr->threadId != NULL) {
|
||
/*
|
||
* TIP #218. When in flight ignore the event, no one will receive
|
||
* it anyway.
|
||
*/
|
||
|
||
Tcl_ThreadAlert(infoPtr->threadId);
|
||
}
|
||
Tcl_MutexUnlock(&consoleMutex);
|
||
}
|
||
|
||
/* Worker exit, so inform the main thread or free TI-structure (if owned) */
|
||
TclPipeThreadExit(&pipeTI);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleWriterThread --
|
||
*
|
||
* This function runs in a separate thread and writes data onto a
|
||
* console.
|
||
*
|
||
* Results:
|
||
* Always returns 0.
|
||
*
|
||
* Side effects:
|
||
|
||
* Signals the main thread when an output operation is completed. May
|
||
* cause the main thread to wake up by posting a message.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static DWORD WINAPI
|
||
ConsoleWriterThread(
|
||
LPVOID arg)
|
||
{
|
||
TclPipeThreadInfo *pipeTI = (TclPipeThreadInfo *)arg;
|
||
ConsoleInfo *infoPtr = NULL; /* access info only after success init/wait */
|
||
HANDLE *handle = NULL;
|
||
ConsoleThreadInfo *threadInfo = NULL;
|
||
DWORD count, toWrite;
|
||
char *buf;
|
||
int done = 0;
|
||
|
||
while (!done) {
|
||
/*
|
||
* Wait for the main thread to signal before attempting to write.
|
||
*/
|
||
if (!TclPipeThreadWaitForSignal(&pipeTI)) {
|
||
/* exit */
|
||
break;
|
||
}
|
||
if (!infoPtr) {
|
||
infoPtr = (ConsoleInfo *)pipeTI->clientData;
|
||
handle = infoPtr->handle;
|
||
threadInfo = &infoPtr->writer;
|
||
}
|
||
|
||
buf = infoPtr->writeBuf;
|
||
toWrite = infoPtr->toWrite;
|
||
|
||
/*
|
||
* Loop until all of the bytes are written or an error occurs.
|
||
*/
|
||
|
||
while (toWrite > 0) {
|
||
if (WriteConsoleBytes(handle, buf, (DWORD) toWrite,
|
||
&count) == FALSE) {
|
||
infoPtr->writeError = GetLastError();
|
||
done = 1;
|
||
break;
|
||
}
|
||
toWrite -= count;
|
||
buf += count;
|
||
}
|
||
|
||
/*
|
||
* Signal the main thread by signalling the writable event and then
|
||
* waking up the notifier thread.
|
||
*/
|
||
|
||
SetEvent(threadInfo->readyEvent);
|
||
|
||
/*
|
||
* Alert the foreground thread. Note that we need to treat this like a
|
||
* critical section so the foreground thread does not terminate this
|
||
* thread while we are holding a mutex in the notifier code.
|
||
*/
|
||
|
||
Tcl_MutexLock(&consoleMutex);
|
||
if (infoPtr->threadId != NULL) {
|
||
/*
|
||
* TIP #218. When in flight ignore the event, no one will receive
|
||
* it anyway.
|
||
*/
|
||
|
||
Tcl_ThreadAlert(infoPtr->threadId);
|
||
}
|
||
Tcl_MutexUnlock(&consoleMutex);
|
||
}
|
||
|
||
/* Worker exit, so inform the main thread or free TI-structure (if owned) */
|
||
TclPipeThreadExit(&pipeTI);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclWinOpenConsoleChannel --
|
||
*
|
||
* Constructs a Console channel for the specified standard OS handle.
|
||
* This is a helper function to break up the construction of channels
|
||
* into File, Console, or Serial.
|
||
*
|
||
* Results:
|
||
* Returns the new channel, or NULL.
|
||
*
|
||
* Side effects:
|
||
* May open the channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Channel
|
||
TclWinOpenConsoleChannel(
|
||
HANDLE handle,
|
||
char *channelName,
|
||
int permissions)
|
||
{
|
||
char encoding[4 + TCL_INTEGER_SPACE];
|
||
ConsoleInfo *infoPtr;
|
||
DWORD modes;
|
||
|
||
ConsoleInit();
|
||
|
||
/*
|
||
* See if a channel with this handle already exists.
|
||
*/
|
||
|
||
infoPtr = ckalloc(sizeof(ConsoleInfo));
|
||
memset(infoPtr, 0, sizeof(ConsoleInfo));
|
||
|
||
infoPtr->validMask = permissions;
|
||
infoPtr->handle = handle;
|
||
infoPtr->channel = (Tcl_Channel) NULL;
|
||
|
||
wsprintfA(encoding, "cp%d", GetConsoleCP());
|
||
|
||
infoPtr->threadId = Tcl_GetCurrentThread();
|
||
|
||
/*
|
||
* Use the pointer for the name of the result channel. This keeps the
|
||
* channel names unique, since some may share handles (stdin/stdout/stderr
|
||
* for instance).
|
||
*/
|
||
|
||
sprintf(channelName, "file%" TCL_Z_MODIFIER "x", (size_t) infoPtr);
|
||
|
||
infoPtr->channel = Tcl_CreateChannel(&consoleChannelType, channelName,
|
||
infoPtr, permissions);
|
||
|
||
if (permissions & TCL_READABLE) {
|
||
/*
|
||
* Make sure the console input buffer is ready for only character
|
||
* input notifications and the buffer is set for line buffering. IOW,
|
||
* we only want to catch when complete lines are ready for reading.
|
||
*/
|
||
|
||
GetConsoleMode(infoPtr->handle, &modes);
|
||
modes &= ~(ENABLE_WINDOW_INPUT | ENABLE_MOUSE_INPUT);
|
||
modes |= ENABLE_LINE_INPUT;
|
||
SetConsoleMode(infoPtr->handle, modes);
|
||
|
||
infoPtr->reader.readyEvent = CreateEventW(NULL, TRUE, TRUE, NULL);
|
||
infoPtr->reader.thread = CreateThread(NULL, 256, ConsoleReaderThread,
|
||
TclPipeThreadCreateTI(&infoPtr->reader.TI, infoPtr,
|
||
infoPtr->reader.readyEvent), 0, NULL);
|
||
SetThreadPriority(infoPtr->reader.thread, THREAD_PRIORITY_HIGHEST);
|
||
}
|
||
|
||
if (permissions & TCL_WRITABLE) {
|
||
|
||
infoPtr->writer.readyEvent = CreateEventW(NULL, TRUE, TRUE, NULL);
|
||
infoPtr->writer.thread = CreateThread(NULL, 256, ConsoleWriterThread,
|
||
TclPipeThreadCreateTI(&infoPtr->writer.TI, infoPtr,
|
||
infoPtr->writer.readyEvent), 0, NULL);
|
||
SetThreadPriority(infoPtr->writer.thread, THREAD_PRIORITY_HIGHEST);
|
||
}
|
||
|
||
/*
|
||
* Files have default translation of AUTO and ^Z eof char, which means
|
||
* that a ^Z will be accepted as EOF when reading.
|
||
*/
|
||
|
||
Tcl_SetChannelOption(NULL, infoPtr->channel, "-translation", "auto");
|
||
Tcl_SetChannelOption(NULL, infoPtr->channel, "-eofchar", "\032 {}");
|
||
Tcl_SetChannelOption(NULL, infoPtr->channel, "-encoding", "unicode");
|
||
return infoPtr->channel;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConsoleThreadActionProc --
|
||
*
|
||
* Insert or remove any thread local refs to this channel.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Changes thread local list of valid channels.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ConsoleThreadActionProc(
|
||
ClientData instanceData,
|
||
int action)
|
||
{
|
||
ConsoleInfo *infoPtr = instanceData;
|
||
|
||
/*
|
||
* We do not access firstConsolePtr in the thread structures. This is not
|
||
* for all serials managed by the thread, but only those we are watching.
|
||
* Removal of the filevent handlers before transfer thus takes care of
|
||
* this structure.
|
||
*/
|
||
|
||
Tcl_MutexLock(&consoleMutex);
|
||
if (action == TCL_CHANNEL_THREAD_INSERT) {
|
||
/*
|
||
* We can't copy the thread information from the channel when the
|
||
* channel is created. At this time the channel back pointer has not
|
||
* been set yet. However in that case the threadId has already been
|
||
* set by TclpCreateCommandChannel itself, so the structure is still
|
||
* good.
|
||
*/
|
||
|
||
ConsoleInit();
|
||
if (infoPtr->channel != NULL) {
|
||
infoPtr->threadId = Tcl_GetChannelThread(infoPtr->channel);
|
||
}
|
||
} else {
|
||
infoPtr->threadId = NULL;
|
||
}
|
||
Tcl_MutexUnlock(&consoleMutex);
|
||
}
|
||
|
||
/*
|
||
* Local Variables:
|
||
* mode: c
|
||
* c-basic-offset: 4
|
||
* fill-column: 78
|
||
* End:
|
||
*/
|