diff options
Diffstat (limited to 'win/tclWinConsole.c')
| -rw-r--r-- | win/tclWinConsole.c | 484 |
1 files changed, 253 insertions, 231 deletions
diff --git a/win/tclWinConsole.c b/win/tclWinConsole.c index 361fb3d..6630083 100644 --- a/win/tclWinConsole.c +++ b/win/tclWinConsole.c @@ -12,9 +12,6 @@ #include "tclWinInt.h" -#include <fcntl.h> -#include <io.h> - /* * The following variable is used to tell whether this module has been * initialized. @@ -48,6 +45,23 @@ TCL_DECLARE_MUTEX(consoleMutex) #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. */ + HANDLE startEvent; /* Auto-reset event used by the main thread to + * signal when the thread should attempt to do + * its normal work. */ + HANDLE stopEvent; /* Auto-reset event used by the main thread to + * signal when the thread should exit. */ +} ConsoleThreadInfo; + +/* * This structure describes per-instance data for a console based channel. */ @@ -66,24 +80,18 @@ typedef struct ConsoleInfo { Tcl_ThreadId threadId; /* Thread to which events should be reported. * This value is used by the reader/writer * threads. */ - HANDLE writeThread; /* Handle to writer thread. */ - HANDLE readThread; /* Handle to reader thread. */ - HANDLE writable; /* Manual-reset event to signal when the - * writer thread has finished waiting for the - * current buffer to be written. */ - HANDLE readable; /* Manual-reset event to signal when the - * reader thread has finished waiting for - * input. */ - HANDLE startWriter; /* Auto-reset event used by the main thread to - * signal when the writer thread should - * attempt to write to the console. */ - HANDLE stopWriter; /* Auto-reset event used by the main thread to - * signal when the writer thread should exit */ - HANDLE startReader; /* Auto-reset event used by the main thread to - * signal when the reader thread should - * attempt to read from the console. */ - HANDLE stopReader; /* Auto-reset event used by the main thread to - * signal when the reader thread should exit */ + ConsoleThreadInfo writer; /* A specialized thread for handling + * asynchronous writes to the console; the + * waiting starts when a start event is sent, + * and a reset event is sent back to the main + * thread when the write is done. A stop event + * is used to terminate the thread. */ + ConsoleThreadInfo reader; /* A specialized thread for handling + * asynchronous reads from the console; the + * waiting starts when a start event is sent, + * and a reset event is sent back to the main + * thread when input is available. A stop + * event is used to terminate the thread. */ DWORD writeError; /* An error caused by the last background * write. Set to 0 if no error has been * detected. This word is shared with the @@ -98,8 +106,8 @@ typedef struct ConsoleInfo { int readFlags; /* Flags that are shared with the reader * thread. Access is synchronized with the * readable object. */ - int bytesRead; /* number of bytes in the buffer */ - int offset; /* number of bytes read out of the buffer */ + int bytesRead; /* Number of bytes in the buffer. */ + int offset; /* Number of bytes read out of the buffer. */ char buffer[CONSOLE_BUFFER_SIZE]; /* Data consumed by reader thread. */ } ConsoleInfo; @@ -133,7 +141,8 @@ typedef struct ConsoleEvent { * Declarations for functions used only in this file. */ -static int ConsoleBlockModeProc(ClientData instanceData,int mode); +static int ConsoleBlockModeProc(ClientData instanceData, + int mode); static void ConsoleCheckProc(ClientData clientData, int flags); static int ConsoleCloseProc(ClientData instanceData, Tcl_Interp *interp); @@ -145,7 +154,7 @@ static void ConsoleInit(void); static int ConsoleInputProc(ClientData instanceData, char *buf, int toRead, int *errorCode); static int ConsoleOutputProc(ClientData instanceData, - CONST char *buf, int toWrite, int *errorCode); + const char *buf, int toWrite, int *errorCode); static DWORD WINAPI ConsoleReaderThread(LPVOID arg); static void ConsoleSetupProc(ClientData clientData, int flags); static void ConsoleWatchProc(ClientData instanceData, int mask); @@ -154,13 +163,22 @@ static void ProcExitHandler(ClientData clientData); static int WaitForRead(ConsoleInfo *infoPtr, int blocking); static void ConsoleThreadActionProc(ClientData instanceData, int action); +static BOOL ReadConsoleBytes(HANDLE hConsole, LPVOID lpBuffer, + DWORD nbytes, LPDWORD nbytesread); +static BOOL WriteConsoleBytes(HANDLE hConsole, + const void *lpBuffer, DWORD nbytes, + LPDWORD nbyteswritten); +static void StartChannelThread(ConsoleInfo *infoPtr, + ConsoleThreadInfo *threadInfoPtr, + LPTHREAD_START_ROUTINE threadProc); +static void StopChannelThread(ConsoleThreadInfo *threadInfoPtr); /* * This structure describes the channel type structure for command console * based IO. */ -static Tcl_ChannelType consoleChannelType = { +static const Tcl_ChannelType consoleChannelType = { "console", /* Type name. */ TCL_CHANNEL_VERSION_5, /* v5 channel */ ConsoleCloseProc, /* Close proc. */ @@ -172,23 +190,27 @@ static Tcl_ChannelType consoleChannelType = { ConsoleWatchProc, /* Set up notifier to watch the channel. */ ConsoleGetHandleProc, /* Get an OS handle from channel. */ NULL, /* close2proc. */ - ConsoleBlockModeProc, /* Set blocking or non-blocking mode.*/ - NULL, /* flush proc. */ - NULL, /* handler proc. */ - NULL, /* wide seek proc */ - ConsoleThreadActionProc, /* thread action proc */ - NULL, /* truncation */ + ConsoleBlockModeProc, /* Set blocking or non-blocking mode. */ + NULL, /* Flush proc. */ + NULL, /* Handler proc. */ + NULL, /* Wide seek proc. */ + ConsoleThreadActionProc, /* Thread action proc. */ + NULL /* Truncation proc. */ }; /* *---------------------------------------------------------------------- * - * readConsoleBytes, writeConsoleBytes -- - * Wrapper for ReadConsole{A,W}, that takes and returns number of bytes - * instead of number of TCHARS + * ReadConsoleBytes, WriteConsoleBytes -- + * + * Wrapper for ReadConsole{A,W}, that takes and returns number of bytes + * instead of number of TCHARS. + * + *---------------------------------------------------------------------- */ + static BOOL -readConsoleBytes( +ReadConsoleBytes( HANDLE hConsole, LPVOID lpBuffer, DWORD nbytes, @@ -196,30 +218,32 @@ readConsoleBytes( { DWORD ntchars; BOOL result; - int tcharsize; - tcharsize = tclWinProcs->useWide? 2 : 1; - result = tclWinProcs->readConsoleProc( - hConsole, lpBuffer, nbytes / tcharsize, &ntchars, NULL); - if (nbytesread) - *nbytesread = (ntchars*tcharsize); + int tcharsize = sizeof(TCHAR); + + result = ReadConsole(hConsole, lpBuffer, nbytes / tcharsize, &ntchars, + NULL); + if (nbytesread != NULL) { + *nbytesread = ntchars * tcharsize; + } return result; } static BOOL -writeConsoleBytes( +WriteConsoleBytes( HANDLE hConsole, - const VOID *lpBuffer, + const void *lpBuffer, DWORD nbytes, LPDWORD nbyteswritten) { DWORD ntchars; BOOL result; - int tcharsize; - tcharsize = tclWinProcs->useWide? 2 : 1; - result = tclWinProcs->writeConsoleProc( - hConsole, lpBuffer, nbytes / tcharsize, &ntchars, NULL); - if (nbyteswritten) - *nbyteswritten = (ntchars*tcharsize); + int tcharsize = sizeof(TCHAR); + + result = WriteConsole(hConsole, lpBuffer, nbytes / tcharsize, &ntchars, + NULL); + if (nbyteswritten != NULL) { + *nbyteswritten = ntchars * tcharsize; + } return result; } @@ -242,8 +266,6 @@ writeConsoleBytes( static void ConsoleInit(void) { - ThreadSpecificData *tsdPtr; - /* * Check the initialized flag first, then check again in the mutex. This * is a speed enhancement. @@ -258,9 +280,9 @@ ConsoleInit(void) Tcl_MutexUnlock(&consoleMutex); } - tsdPtr = (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - if (tsdPtr == NULL) { - tsdPtr = TCL_TSD_INIT(&dataKey); + if (TclThreadDataKeyGet(&dataKey) == NULL) { + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); + tsdPtr->firstConsolePtr = NULL; Tcl_CreateEventSource(ConsoleSetupProc, ConsoleCheckProc, NULL); Tcl_CreateThreadExitHandler(ConsoleExitHandler, NULL); @@ -286,7 +308,7 @@ ConsoleInit(void) static void ConsoleExitHandler( - ClientData clientData) /* Old window proc */ + ClientData clientData) /* Old window proc. */ { Tcl_DeleteEventSource(ConsoleSetupProc, ConsoleCheckProc, NULL); } @@ -310,7 +332,7 @@ ConsoleExitHandler( static void ProcExitHandler( - ClientData clientData) /* Old window proc */ + ClientData clientData) /* Old window proc. */ { Tcl_MutexLock(&consoleMutex); initialized = 0; @@ -355,7 +377,8 @@ ConsoleSetupProc( for (infoPtr = tsdPtr->firstConsolePtr; infoPtr != NULL; infoPtr = infoPtr->nextPtr) { if (infoPtr->watchMask & TCL_WRITABLE) { - if (WaitForSingleObject(infoPtr->writable, 0) != WAIT_TIMEOUT) { + if (WaitForSingleObject(infoPtr->writer.readyEvent, + 0) != WAIT_TIMEOUT) { block = 0; } } @@ -393,7 +416,6 @@ ConsoleCheckProc( int flags) /* Event flags as passed to Tcl_DoOneEvent. */ { ConsoleInfo *infoPtr; - ConsoleEvent *evPtr; int needEvent; ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); @@ -418,7 +440,8 @@ ConsoleCheckProc( needEvent = 0; if (infoPtr->watchMask & TCL_WRITABLE) { - if (WaitForSingleObject(infoPtr->writable, 0) != WAIT_TIMEOUT) { + if (WaitForSingleObject(infoPtr->writer.readyEvent, + 0) != WAIT_TIMEOUT) { needEvent = 1; } } @@ -430,8 +453,9 @@ ConsoleCheckProc( } if (needEvent) { + ConsoleEvent *evPtr = ckalloc(sizeof(ConsoleEvent)); + infoPtr->flags |= CONSOLE_PENDING; - evPtr = (ConsoleEvent *) ckalloc(sizeof(ConsoleEvent)); evPtr->header.proc = ConsoleEventProc; evPtr->infoPtr = infoPtr; Tcl_QueueEvent((Tcl_Event *) evPtr, TCL_QUEUE_TAIL); @@ -439,7 +463,6 @@ ConsoleCheckProc( } } - /* *---------------------------------------------------------------------- * @@ -462,7 +485,7 @@ ConsoleBlockModeProc( int mode) /* TCL_MODE_BLOCKING or * TCL_MODE_NONBLOCKING. */ { - ConsoleInfo *infoPtr = (ConsoleInfo *) instanceData; + ConsoleInfo *infoPtr = instanceData; /* * Consoles on Windows can not be switched between blocking and @@ -475,7 +498,7 @@ ConsoleBlockModeProc( if (mode == TCL_MODE_NONBLOCKING) { infoPtr->flags |= CONSOLE_ASYNC; } else { - infoPtr->flags &= ~(CONSOLE_ASYNC); + infoPtr->flags &= ~CONSOLE_ASYNC; } return 0; } @@ -483,6 +506,84 @@ ConsoleBlockModeProc( /* *---------------------------------------------------------------------- * + * StartChannelThread, StopChannelThread -- + * + * Helpers that codify how to ask one of the console service threads to + * start and stop. + * + *---------------------------------------------------------------------- + */ + +static void +StartChannelThread( + ConsoleInfo *infoPtr, + ConsoleThreadInfo *threadInfoPtr, + LPTHREAD_START_ROUTINE threadProc) +{ + DWORD id; + + threadInfoPtr->readyEvent = CreateEvent(NULL, TRUE, TRUE, NULL); + threadInfoPtr->startEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + threadInfoPtr->stopEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + threadInfoPtr->thread = CreateThread(NULL, 256, threadProc, infoPtr, 0, + &id); + SetThreadPriority(threadInfoPtr->thread, THREAD_PRIORITY_HIGHEST); +} + +static void +StopChannelThread( + ConsoleThreadInfo *threadInfoPtr) +{ + DWORD exitCode = 0; + + /* + * The thread may already have closed on it's own. Check it's exit + * code. + */ + + GetExitCodeThread(threadInfoPtr->thread, &exitCode); + if (exitCode == STILL_ACTIVE) { + /* + * Set the stop event so that if the reader thread is blocked in + * ConsoleReaderThread on WaitForMultipleEvents, it will exit cleanly. + */ + + SetEvent(threadInfoPtr->stopEvent); + + /* + * Wait at most 20 milliseconds for the reader thread to close. + */ + + if (WaitForSingleObject(threadInfoPtr->thread, 20) == WAIT_TIMEOUT) { + /* + * Forcibly terminate the background thread as a last resort. + * Note that we need to guard against terminating the thread while + * it is in the middle of Tcl_ThreadAlert because it won't be able + * to release the notifier lock. + */ + + Tcl_MutexLock(&consoleMutex); + /* BUG: this leaks memory. */ + TerminateThread(threadInfoPtr->thread, 0); + Tcl_MutexUnlock(&consoleMutex); + } + } + + /* + * Close all the handles associated with the thread, and set the thread + * handle field to NULL to mark that the thread has been cleaned up. + */ + + CloseHandle(threadInfoPtr->thread); + CloseHandle(threadInfoPtr->readyEvent); + CloseHandle(threadInfoPtr->startEvent); + CloseHandle(threadInfoPtr->stopEvent); + threadInfoPtr->thread = NULL; +} + +/* + *---------------------------------------------------------------------- + * * ConsoleCloseProc -- * * Closes a console based IO channel. @@ -501,13 +602,10 @@ ConsoleCloseProc( ClientData instanceData, /* Pointer to ConsoleInfo structure. */ Tcl_Interp *interp) /* For error reporting. */ { - ConsoleInfo *consolePtr = (ConsoleInfo *) instanceData; - int errorCode; + ConsoleInfo *consolePtr = instanceData; + int errorCode = 0; ConsoleInfo *infoPtr, **nextPtrPtr; ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - DWORD exitCode; - - errorCode = 0; /* * Clean up the background thread if necessary. Note that this must be @@ -515,49 +613,8 @@ ConsoleCloseProc( * trying to read from the console. */ - if (consolePtr->readThread) { - /* - * The thread may already have closed on it's own. Check it's exit - * code. - */ - - GetExitCodeThread(consolePtr->readThread, &exitCode); - - if (exitCode == STILL_ACTIVE) { - /* - * Set the stop event so that if the reader thread is blocked in - * ConsoleReaderThread on WaitForMultipleEvents, it will exit - * cleanly. - */ - - SetEvent(consolePtr->stopReader); - - /* - * Wait at most 20 milliseconds for the reader thread to close. - */ - - if (WaitForSingleObject(consolePtr->readThread, 20) - == WAIT_TIMEOUT) { - /* - * Forcibly terminate the background thread as a last resort. - * Note that we need to guard against terminating the thread - * while it is in the middle of Tcl_ThreadAlert because it - * won't be able to release the notifier lock. - */ - - Tcl_MutexLock(&consoleMutex); - - /* BUG: this leaks memory. */ - TerminateThread(consolePtr->readThread, 0); - Tcl_MutexUnlock(&consoleMutex); - } - } - - CloseHandle(consolePtr->readThread); - CloseHandle(consolePtr->readable); - CloseHandle(consolePtr->startReader); - CloseHandle(consolePtr->stopReader); - consolePtr->readThread = NULL; + if (consolePtr->reader.thread) { + StopChannelThread(&consolePtr->reader); } consolePtr->validMask &= ~TCL_READABLE; @@ -567,62 +624,20 @@ ConsoleCloseProc( * should be no pending write operations. */ - if (consolePtr->writeThread) { + 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] + * prevent infinite wait on exit. [Python Bug 216289] */ - WaitForSingleObject(consolePtr->writable, INFINITE); + WaitForSingleObject(consolePtr->writer.readyEvent, INFINITE); } - /* - * The thread may already have closed on it's own. Check it's exit - * code. - */ - - GetExitCodeThread(consolePtr->writeThread, &exitCode); - - if (exitCode == STILL_ACTIVE) { - /* - * Set the stop event so that if the reader thread is blocked in - * ConsoleWriterThread on WaitForMultipleEvents, it will exit - * cleanly. - */ - - SetEvent(consolePtr->stopWriter); - - /* - * Wait at most 20 milliseconds for the writer thread to close. - */ - - if (WaitForSingleObject(consolePtr->writeThread, 20) - == WAIT_TIMEOUT) { - /* - * Forcibly terminate the background thread as a last resort. - * Note that we need to guard against terminating the thread - * while it is in the middle of Tcl_ThreadAlert because it - * won't be able to release the notifier lock. - */ - - Tcl_MutexLock(&consoleMutex); - - /* BUG: this leaks memory. */ - TerminateThread(consolePtr->writeThread, 0); - Tcl_MutexUnlock(&consoleMutex); - } - } - - CloseHandle(consolePtr->writeThread); - CloseHandle(consolePtr->writable); - CloseHandle(consolePtr->startWriter); - CloseHandle(consolePtr->stopWriter); - consolePtr->writeThread = NULL; + StopChannelThread(&consolePtr->writer); } 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 @@ -648,7 +663,7 @@ ConsoleCloseProc( for (nextPtrPtr = &(tsdPtr->firstConsolePtr), infoPtr = *nextPtrPtr; infoPtr != NULL; nextPtrPtr = &infoPtr->nextPtr, infoPtr = *nextPtrPtr) { - if (infoPtr == (ConsoleInfo *)consolePtr) { + if (infoPtr == (ConsoleInfo *) consolePtr) { *nextPtrPtr = infoPtr->nextPtr; break; } @@ -657,7 +672,7 @@ ConsoleCloseProc( ckfree(consolePtr->writeBuf); consolePtr->writeBuf = 0; } - ckfree((char*) consolePtr); + ckfree(consolePtr); return errorCode; } @@ -688,7 +703,7 @@ ConsoleInputProc( * buffer? */ int *errorCode) /* Where to store error code. */ { - ConsoleInfo *infoPtr = (ConsoleInfo *) instanceData; + ConsoleInfo *infoPtr = instanceData; DWORD count, bytesRead = 0; int result; @@ -723,7 +738,7 @@ ConsoleInputProc( bytesRead = infoPtr->bytesRead - infoPtr->offset; /* - * Reset the buffer + * Reset the buffer. */ infoPtr->readFlags &= ~CONSOLE_BUFFERED; @@ -739,8 +754,15 @@ ConsoleInputProc( * byte is available or an EOF occurs. */ - if (readConsoleBytes(infoPtr->handle, (LPVOID) buf, (DWORD) bufSize, &count) - == TRUE) { + 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; } @@ -769,22 +791,23 @@ ConsoleInputProc( static int ConsoleOutputProc( ClientData instanceData, /* Console state. */ - CONST char *buf, /* The data buffer. */ + const char *buf, /* The data buffer. */ int toWrite, /* How many bytes to write? */ int *errorCode) /* Where to store error code. */ { - ConsoleInfo *infoPtr = (ConsoleInfo *) instanceData; + ConsoleInfo *infoPtr = instanceData; + ConsoleThreadInfo *threadInfo = &infoPtr->reader; DWORD bytesWritten, timeout; *errorCode = 0; timeout = (infoPtr->flags & CONSOLE_ASYNC) ? 0 : INFINITE; - if (WaitForSingleObject(infoPtr->writable, timeout) == WAIT_TIMEOUT) { + 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 = EAGAIN; + errno = EWOULDBLOCK; goto error; } @@ -813,12 +836,12 @@ ConsoleOutputProc( ckfree(infoPtr->writeBuf); } infoPtr->writeBufLen = toWrite; - infoPtr->writeBuf = ckalloc((size_t)toWrite); + infoPtr->writeBuf = ckalloc(toWrite); } - memcpy(infoPtr->writeBuf, buf, (size_t)toWrite); + memcpy(infoPtr->writeBuf, buf, (size_t) toWrite); infoPtr->toWrite = toWrite; - ResetEvent(infoPtr->writable); - SetEvent(infoPtr->startWriter); + ResetEvent(threadInfo->readyEvent); + SetEvent(threadInfo->startEvent); bytesWritten = toWrite; } else { /* @@ -826,9 +849,8 @@ ConsoleOutputProc( * avoids an unnecessary copy. */ - if (writeConsoleBytes(infoPtr->handle, buf, (DWORD)toWrite, - &bytesWritten) - == FALSE) { + if (WriteConsoleBytes(infoPtr->handle, buf, (DWORD) toWrite, + &bytesWritten) == FALSE) { TclWinConvertError(GetLastError()); goto error; } @@ -867,7 +889,7 @@ ConsoleEventProc( int flags) /* Flags that indicate what events to handle, * such as TCL_FILE_EVENTS. */ { - ConsoleEvent *consoleEvPtr = (ConsoleEvent *)evPtr; + ConsoleEvent *consoleEvPtr = (ConsoleEvent *) evPtr; ConsoleInfo *infoPtr; int mask; ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); @@ -886,7 +908,7 @@ ConsoleEventProc( for (infoPtr = tsdPtr->firstConsolePtr; infoPtr != NULL; infoPtr = infoPtr->nextPtr) { if (consoleEvPtr->infoPtr == infoPtr) { - infoPtr->flags &= ~(CONSOLE_PENDING); + infoPtr->flags &= ~CONSOLE_PENDING; break; } } @@ -907,7 +929,8 @@ ConsoleEventProc( mask = 0; if (infoPtr->watchMask & TCL_WRITABLE) { - if (WaitForSingleObject(infoPtr->writable, 0) != WAIT_TIMEOUT) { + if (WaitForSingleObject(infoPtr->writer.readyEvent, + 0) != WAIT_TIMEOUT) { mask = TCL_WRITABLE; } } @@ -954,7 +977,7 @@ ConsoleWatchProc( * TCL_EXCEPTION. */ { ConsoleInfo **nextPtrPtr, *ptr; - ConsoleInfo *infoPtr = (ConsoleInfo *) instanceData; + ConsoleInfo *infoPtr = instanceData; int oldMask = infoPtr->watchMask; ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); @@ -966,6 +989,7 @@ ConsoleWatchProc( infoPtr->watchMask = mask & infoPtr->validMask; if (infoPtr->watchMask) { Tcl_Time blockTime = { 0, 0 }; + if (!oldMask) { infoPtr->nextPtr = tsdPtr->firstConsolePtr; tsdPtr->firstConsolePtr = infoPtr; @@ -1008,12 +1032,12 @@ ConsoleWatchProc( static int ConsoleGetHandleProc( ClientData instanceData, /* The console state. */ - int direction, /* TCL_READABLE or TCL_WRITABLE */ + int direction, /* TCL_READABLE or TCL_WRITABLE. */ ClientData *handlePtr) /* Where to store the handle. */ { - ConsoleInfo *infoPtr = (ConsoleInfo *) instanceData; + ConsoleInfo *infoPtr = instanceData; - *handlePtr = (ClientData) infoPtr->handle; + *handlePtr = infoPtr->handle; return TCL_OK; } @@ -1046,6 +1070,7 @@ WaitForRead( { DWORD timeout, count; HANDLE *handle = infoPtr->handle; + ConsoleThreadInfo *threadInfo = &infoPtr->reader; INPUT_RECORD input; while (1) { @@ -1054,13 +1079,14 @@ WaitForRead( */ timeout = blocking ? INFINITE : 0; - if (WaitForSingleObject(infoPtr->readable, timeout) == WAIT_TIMEOUT) { + if (WaitForSingleObject(threadInfo->readyEvent, + timeout) == WAIT_TIMEOUT) { /* * The reader thread is blocked waiting for data and the channel * is in non-blocking mode. */ - errno = EAGAIN; + errno = EWOULDBLOCK; return -1; } @@ -1113,8 +1139,8 @@ WaitForRead( * There wasn't any data available, so reset the thread and try again. */ - ResetEvent(infoPtr->readable); - SetEvent(infoPtr->startReader); + ResetEvent(threadInfo->readyEvent); + SetEvent(threadInfo->startEvent); } } @@ -1141,14 +1167,18 @@ static DWORD WINAPI ConsoleReaderThread( LPVOID arg) { - ConsoleInfo *infoPtr = (ConsoleInfo *)arg; + ConsoleInfo *infoPtr = arg; HANDLE *handle = infoPtr->handle; + ConsoleThreadInfo *threadInfo = &infoPtr->reader; DWORD waitResult; HANDLE wEvents[2]; - /* The first event takes precedence. */ - wEvents[0] = infoPtr->stopReader; - wEvents[1] = infoPtr->startReader; + /* + * The first event takes precedence. + */ + + wEvents[0] = threadInfo->stopEvent; + wEvents[1] = threadInfo->startEvent; for (;;) { /* @@ -1171,7 +1201,7 @@ ConsoleReaderThread( * not KEY_EVENTs. */ - if (readConsoleBytes(handle, infoPtr->buffer, CONSOLE_BUFFER_SIZE, + if (ReadConsoleBytes(handle, infoPtr->buffer, CONSOLE_BUFFER_SIZE, (LPDWORD) &infoPtr->bytesRead) != FALSE) { /* * Data was stored in the buffer. @@ -1179,10 +1209,9 @@ ConsoleReaderThread( infoPtr->readFlags |= CONSOLE_BUFFERED; } else { - DWORD err; - err = GetLastError(); + DWORD err = GetLastError(); - if (err == (DWORD)EOF) { + if (err == (DWORD) EOF) { infoPtr->readFlags = CONSOLE_EOF; } } @@ -1192,7 +1221,7 @@ ConsoleReaderThread( * waking up the notifier thread. */ - SetEvent(infoPtr->readable); + SetEvent(threadInfo->readyEvent); /* * Alert the foreground thread. Note that we need to treat this like a @@ -1206,6 +1235,7 @@ ConsoleReaderThread( * TIP #218. When in flight ignore the event, no one will receive * it anyway. */ + Tcl_ThreadAlert(infoPtr->threadId); } Tcl_MutexUnlock(&consoleMutex); @@ -1237,16 +1267,19 @@ static DWORD WINAPI ConsoleWriterThread( LPVOID arg) { - - ConsoleInfo *infoPtr = (ConsoleInfo *)arg; + ConsoleInfo *infoPtr = arg; HANDLE *handle = infoPtr->handle; + ConsoleThreadInfo *threadInfo = &infoPtr->writer; DWORD count, toWrite, waitResult; char *buf; HANDLE wEvents[2]; - /* The first event takes precedence. */ - wEvents[0] = infoPtr->stopWriter; - wEvents[1] = infoPtr->startWriter; + /* + * The first event takes precedence. + */ + + wEvents[0] = threadInfo->stopEvent; + wEvents[1] = threadInfo->startEvent; for (;;) { /* @@ -1272,14 +1305,13 @@ ConsoleWriterThread( */ while (toWrite > 0) { - if (writeConsoleBytes(handle, buf, (DWORD)toWrite, - &count) == FALSE) { + if (WriteConsoleBytes(handle, buf, (DWORD) toWrite, + &count) == FALSE) { infoPtr->writeError = GetLastError(); break; - } else { - toWrite -= count; - buf += count; } + toWrite -= count; + buf += count; } /* @@ -1287,7 +1319,7 @@ ConsoleWriterThread( * waking up the notifier thread. */ - SetEvent(infoPtr->writable); + SetEvent(threadInfo->readyEvent); /* * Alert the foreground thread. Note that we need to treat this like a @@ -1323,7 +1355,7 @@ ConsoleWriterThread( * Returns the new channel, or NULL. * * Side effects: - * May open the channel + * May open the channel. * *---------------------------------------------------------------------- */ @@ -1336,7 +1368,7 @@ TclWinOpenConsoleChannel( { char encoding[4 + TCL_INTEGER_SPACE]; ConsoleInfo *infoPtr; - DWORD id, modes; + DWORD modes; ConsoleInit(); @@ -1344,7 +1376,7 @@ TclWinOpenConsoleChannel( * See if a channel with this handle already exists. */ - infoPtr = (ConsoleInfo *) ckalloc((unsigned) sizeof(ConsoleInfo)); + infoPtr = ckalloc(sizeof(ConsoleInfo)); memset(infoPtr, 0, sizeof(ConsoleInfo)); infoPtr->validMask = permissions; @@ -1361,10 +1393,10 @@ TclWinOpenConsoleChannel( * for instance). */ - sprintf(channelName, "file%" TCL_I_MODIFIER "x", (size_t)infoPtr); + sprintf(channelName, "file%" TCL_I_MODIFIER "x", (size_t) infoPtr); infoPtr->channel = Tcl_CreateChannel(&consoleChannelType, channelName, - (ClientData) infoPtr, permissions); + infoPtr, permissions); if (permissions & TCL_READABLE) { /* @@ -1377,22 +1409,11 @@ TclWinOpenConsoleChannel( modes &= ~(ENABLE_WINDOW_INPUT | ENABLE_MOUSE_INPUT); modes |= ENABLE_LINE_INPUT; SetConsoleMode(infoPtr->handle, modes); - - infoPtr->readable = CreateEvent(NULL, TRUE, TRUE, NULL); - infoPtr->startReader = CreateEvent(NULL, FALSE, FALSE, NULL); - infoPtr->stopReader = CreateEvent(NULL, FALSE, FALSE, NULL); - infoPtr->readThread = CreateThread(NULL, 256, ConsoleReaderThread, - infoPtr, 0, &id); - SetThreadPriority(infoPtr->readThread, THREAD_PRIORITY_HIGHEST); + StartChannelThread(infoPtr, &infoPtr->reader, ConsoleReaderThread); } if (permissions & TCL_WRITABLE) { - infoPtr->writable = CreateEvent(NULL, TRUE, TRUE, NULL); - infoPtr->startWriter = CreateEvent(NULL, FALSE, FALSE, NULL); - infoPtr->stopWriter = CreateEvent(NULL, FALSE, FALSE, NULL); - infoPtr->writeThread = CreateThread(NULL, 256, ConsoleWriterThread, - infoPtr, 0, &id); - SetThreadPriority(infoPtr->writeThread, THREAD_PRIORITY_HIGHEST); + StartChannelThread(infoPtr, &infoPtr->writer, ConsoleWriterThread); } /* @@ -1402,11 +1423,11 @@ TclWinOpenConsoleChannel( Tcl_SetChannelOption(NULL, infoPtr->channel, "-translation", "auto"); Tcl_SetChannelOption(NULL, infoPtr->channel, "-eofchar", "\032 {}"); - if (tclWinProcs->useWide) - Tcl_SetChannelOption(NULL, infoPtr->channel, "-encoding", "unicode"); - else - Tcl_SetChannelOption(NULL, infoPtr->channel, "-encoding", encoding); - +#ifdef UNICODE + Tcl_SetChannelOption(NULL, infoPtr->channel, "-encoding", "unicode"); +#else + Tcl_SetChannelOption(NULL, infoPtr->channel, "-encoding", encoding); +#endif return infoPtr->channel; } @@ -1431,9 +1452,10 @@ ConsoleThreadActionProc( ClientData instanceData, int action) { - ConsoleInfo *infoPtr = (ConsoleInfo *) instanceData; + ConsoleInfo *infoPtr = instanceData; - /* We do not access firstConsolePtr in the thread structures. This is not + /* + * 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. |