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-rw-r--r--win/tclWinThrd.c287
1 files changed, 207 insertions, 80 deletions
diff --git a/win/tclWinThrd.c b/win/tclWinThrd.c
index 66a685c..b9cde72 100644
--- a/win/tclWinThrd.c
+++ b/win/tclWinThrd.c
@@ -5,18 +5,23 @@
*
* Copyright (c) 1998 by Sun Microsystems, Inc.
* Copyright (c) 1999 by Scriptics Corporation
+ * Copyright (c) 2008 by George Peter Staplin
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * RCS: @(#) $Id: tclWinThrd.c,v 1.41 2005/11/04 00:06:51 dkf Exp $
*/
#include "tclWinInt.h"
-#include <fcntl.h>
-#include <io.h>
-#include <sys/stat.h>
+#include <float.h>
+
+/* Workaround for mingw versions which don't provide this in float.h */
+#ifndef _MCW_EM
+# define _MCW_EM 0x0008001F /* Error masks */
+# define _MCW_RC 0x00000300 /* Rounding */
+# define _MCW_PC 0x00030000 /* Precision */
+_CRTIMP unsigned int __cdecl _controlfp (unsigned int unNew, unsigned int unMask);
+#endif
/*
* This is the master lock used to serialize access to other serialization
@@ -24,10 +29,7 @@
*/
static CRITICAL_SECTION masterLock;
-static int init = 0;
-#define MASTER_LOCK TclpMasterLock()
-#define MASTER_UNLOCK TclpMasterUnlock()
-
+static int initialized = 0;
/*
* This is the master lock used to serialize initialization and finalization
@@ -43,8 +45,10 @@ static CRITICAL_SECTION initLock;
#ifdef TCL_THREADS
-static CRITICAL_SECTION allocLock;
-static Tcl_Mutex allocLockPtr = (Tcl_Mutex) &allocLock;
+static struct Tcl_Mutex_ {
+ CRITICAL_SECTION crit;
+} allocLock;
+static Tcl_Mutex allocLockPtr = &allocLock;
static int allocOnce = 0;
#endif /* TCL_THREADS */
@@ -92,20 +96,18 @@ static Tcl_ThreadDataKey dataKey;
* ThreadSpecificData is created.
* WIN_THREAD_RUNNING Running, not waiting.
* WIN_THREAD_BLOCKED Waiting, or trying to wait.
- * WIN_THREAD_DEAD Dying - no per-thread event anymore.
*/
#define WIN_THREAD_UNINIT 0x0
#define WIN_THREAD_RUNNING 0x1
#define WIN_THREAD_BLOCKED 0x2
-#define WIN_THREAD_DEAD 0x4
/*
* The per condition queue pointers and the Mutex used to serialize access to
* the queue.
*/
-typedef struct WinCondition {
+typedef struct {
CRITICAL_SECTION condLock; /* Lock to serialize queuing on the
* condition. */
struct ThreadSpecificData *firstPtr; /* Queue pointers */
@@ -117,16 +119,72 @@ typedef struct WinCondition {
*/
#ifdef USE_THREAD_ALLOC
-static int once;
static DWORD tlsKey;
-typedef struct allocMutex {
+typedef struct {
Tcl_Mutex tlock;
CRITICAL_SECTION wlock;
} allocMutex;
#endif /* USE_THREAD_ALLOC */
/*
+ * The per thread data passed from TclpThreadCreate
+ * to TclWinThreadStart.
+ */
+
+typedef struct {
+ LPTHREAD_START_ROUTINE lpStartAddress; /* Original startup routine */
+ LPVOID lpParameter; /* Original startup data */
+ unsigned int fpControl; /* Floating point control word from the
+ * main thread */
+} WinThread;
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclWinThreadStart --
+ *
+ * This procedure is the entry point for all new threads created
+ * by Tcl on Windows.
+ *
+ * Results:
+ * Various, depending on the result of the wrapped thread start
+ * routine.
+ *
+ * Side effects:
+ * Arbitrary, since user code is executed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static DWORD WINAPI
+TclWinThreadStart(
+ LPVOID lpParameter) /* The WinThread structure pointer passed
+ * from TclpThreadCreate */
+{
+ WinThread *winThreadPtr = (WinThread *) lpParameter;
+ LPTHREAD_START_ROUTINE lpOrigStartAddress;
+ LPVOID lpOrigParameter;
+
+ if (!winThreadPtr) {
+ return TCL_ERROR;
+ }
+
+ _controlfp(winThreadPtr->fpControl, _MCW_EM | _MCW_RC | 0x03000000 /* _MCW_DN */
+#if !defined(_WIN64)
+ | _MCW_PC
+#endif
+ );
+
+ lpOrigStartAddress = winThreadPtr->lpStartAddress;
+ lpOrigParameter = winThreadPtr->lpParameter;
+
+ ckfree(winThreadPtr);
+ return lpOrigStartAddress(lpOrigParameter);
+}
+
+/*
*----------------------------------------------------------------------
*
* TclpThreadCreate --
@@ -146,23 +204,33 @@ typedef struct allocMutex {
int
TclpThreadCreate(
Tcl_ThreadId *idPtr, /* Return, the ID of the thread. */
- Tcl_ThreadCreateProc proc, /* Main() function of the thread. */
+ Tcl_ThreadCreateProc *proc, /* Main() function of the thread. */
ClientData clientData, /* The one argument to Main(). */
int stackSize, /* Size of stack for the new thread. */
int flags) /* Flags controlling behaviour of the new
* thread. */
{
+ WinThread *winThreadPtr; /* Per-thread startup info */
HANDLE tHandle;
+ winThreadPtr = (WinThread *)ckalloc(sizeof(WinThread));
+ winThreadPtr->lpStartAddress = (LPTHREAD_START_ROUTINE) proc;
+ winThreadPtr->lpParameter = clientData;
+ winThreadPtr->fpControl = _controlfp(0, 0);
+
EnterCriticalSection(&joinLock);
+ *idPtr = 0; /* must initialize as Tcl_Thread is a pointer and
+ * on WIN64 sizeof void* != sizeof unsigned
+ */
+
#if defined(_MSC_VER) || defined(__MSVCRT__) || defined(__BORLANDC__)
- tHandle = (HANDLE) _beginthreadex(NULL, (unsigned) stackSize, proc,
- clientData, 0, (unsigned *)idPtr);
+ tHandle = (HANDLE) _beginthreadex(NULL, (unsigned) stackSize,
+ (Tcl_ThreadCreateProc*) TclWinThreadStart, winThreadPtr,
+ 0, (unsigned *)idPtr);
#else
tHandle = CreateThread(NULL, (DWORD) stackSize,
- (LPTHREAD_START_ROUTINE) proc, (LPVOID) clientData,
- (DWORD) 0, (LPDWORD)idPtr);
+ TclWinThreadStart, winThreadPtr, 0, (LPDWORD)idPtr);
#endif
if (tHandle == NULL) {
@@ -260,7 +328,7 @@ TclpThreadExit(
Tcl_ThreadId
Tcl_GetCurrentThread(void)
{
- return (Tcl_ThreadId) GetCurrentThreadId();
+ return (Tcl_ThreadId)(size_t)GetCurrentThreadId();
}
/*
@@ -285,7 +353,7 @@ Tcl_GetCurrentThread(void)
void
TclpInitLock(void)
{
- if (!init) {
+ if (!initialized) {
/*
* There is a fundamental race here that is solved by creating the
* first Tcl interpreter in a single threaded environment. Once the
@@ -293,7 +361,7 @@ TclpInitLock(void)
* that create interpreters in parallel.
*/
- init = 1;
+ initialized = 1;
InitializeCriticalSection(&joinLock);
InitializeCriticalSection(&initLock);
InitializeCriticalSection(&masterLock);
@@ -347,7 +415,7 @@ TclpInitUnlock(void)
void
TclpMasterLock(void)
{
- if (!init) {
+ if (!initialized) {
/*
* There is a fundamental race here that is solved by creating the
* first Tcl interpreter in a single threaded environment. Once the
@@ -355,7 +423,7 @@ TclpMasterLock(void)
* that create interpreters in parallel.
*/
- init = 1;
+ initialized = 1;
InitializeCriticalSection(&joinLock);
InitializeCriticalSection(&initLock);
InitializeCriticalSection(&masterLock);
@@ -410,7 +478,7 @@ Tcl_GetAllocMutex(void)
{
#ifdef TCL_THREADS
if (!allocOnce) {
- InitializeCriticalSection(&allocLock);
+ InitializeCriticalSection(&allocLock.crit);
allocOnce = 1;
}
return &allocLockPtr;
@@ -422,7 +490,7 @@ Tcl_GetAllocMutex(void)
/*
*----------------------------------------------------------------------
*
- * TclpFinalizeLock
+ * TclFinalizeLock
*
* This procedure is used to destroy all private resources used in this
* file.
@@ -440,7 +508,7 @@ Tcl_GetAllocMutex(void)
void
TclFinalizeLock(void)
{
- MASTER_LOCK;
+ TclpMasterLock();
DeleteCriticalSection(&joinLock);
/*
@@ -448,11 +516,11 @@ TclFinalizeLock(void)
*/
DeleteCriticalSection(&masterLock);
- init = 0;
+ initialized = 0;
#ifdef TCL_THREADS
if (allocOnce) {
- DeleteCriticalSection(&allocLock);
+ DeleteCriticalSection(&allocLock.crit);
allocOnce = 0;
}
#endif
@@ -493,20 +561,21 @@ Tcl_MutexLock(
Tcl_Mutex *mutexPtr) /* The lock */
{
CRITICAL_SECTION *csPtr;
+
if (*mutexPtr == NULL) {
- MASTER_LOCK;
+ TclpMasterLock();
/*
* Double inside master lock check to avoid a race.
*/
if (*mutexPtr == NULL) {
- csPtr = (CRITICAL_SECTION *) ckalloc(sizeof(CRITICAL_SECTION));
+ csPtr = ckalloc(sizeof(CRITICAL_SECTION));
InitializeCriticalSection(csPtr);
*mutexPtr = (Tcl_Mutex)csPtr;
TclRememberMutex(mutexPtr);
}
- MASTER_UNLOCK;
+ TclpMasterUnlock();
}
csPtr = *((CRITICAL_SECTION **)mutexPtr);
EnterCriticalSection(csPtr);
@@ -533,6 +602,7 @@ Tcl_MutexUnlock(
Tcl_Mutex *mutexPtr) /* The lock */
{
CRITICAL_SECTION *csPtr = *((CRITICAL_SECTION **)mutexPtr);
+
LeaveCriticalSection(csPtr);
}
@@ -558,9 +628,10 @@ TclpFinalizeMutex(
Tcl_Mutex *mutexPtr)
{
CRITICAL_SECTION *csPtr = *(CRITICAL_SECTION **)mutexPtr;
+
if (csPtr != NULL) {
DeleteCriticalSection(csPtr);
- ckfree((char *) csPtr);
+ ckfree(csPtr);
*mutexPtr = NULL;
}
}
@@ -591,7 +662,7 @@ void
Tcl_ConditionWait(
Tcl_Condition *condPtr, /* Really (WinCondition **) */
Tcl_Mutex *mutexPtr, /* Really (CRITICAL_SECTION **) */
- Tcl_Time *timePtr) /* Timeout on waiting period */
+ const Tcl_Time *timePtr) /* Timeout on waiting period */
{
WinCondition *winCondPtr; /* Per-condition queue head */
CRITICAL_SECTION *csPtr; /* Caller's Mutex, after casting */
@@ -600,21 +671,13 @@ Tcl_ConditionWait(
int doExit = 0; /* True if we need to do exit setup */
ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
- if (tsdPtr->flags & WIN_THREAD_DEAD) {
- /*
- * No more per-thread event on which to wait.
- */
-
- return;
- }
-
/*
* Self initialize the two parts of the condition. The per-condition and
* per-thread parts need to be handled independently.
*/
if (tsdPtr->flags == WIN_THREAD_UNINIT) {
- MASTER_LOCK;
+ TclpMasterLock();
/*
* Create the per-thread event and queue pointers.
@@ -628,7 +691,7 @@ Tcl_ConditionWait(
tsdPtr->flags = WIN_THREAD_RUNNING;
doExit = 1;
}
- MASTER_UNLOCK;
+ TclpMasterUnlock();
if (doExit) {
/*
@@ -638,27 +701,26 @@ Tcl_ConditionWait(
* and initializing that may drop back into the Master Lock.
*/
- Tcl_CreateThreadExitHandler(FinalizeConditionEvent,
- (ClientData) tsdPtr);
+ Tcl_CreateThreadExitHandler(FinalizeConditionEvent, tsdPtr);
}
}
if (*condPtr == NULL) {
- MASTER_LOCK;
+ TclpMasterLock();
/*
* Initialize the per-condition queue pointers and Mutex.
*/
if (*condPtr == NULL) {
- winCondPtr = (WinCondition *)ckalloc(sizeof(WinCondition));
+ winCondPtr = ckalloc(sizeof(WinCondition));
InitializeCriticalSection(&winCondPtr->condLock);
winCondPtr->firstPtr = NULL;
winCondPtr->lastPtr = NULL;
- *condPtr = (Tcl_Condition)winCondPtr;
+ *condPtr = (Tcl_Condition) winCondPtr;
TclRememberCondition(condPtr);
}
- MASTER_UNLOCK;
+ TclpMasterUnlock();
}
csPtr = *((CRITICAL_SECTION **)mutexPtr);
winCondPtr = *((WinCondition **)condPtr);
@@ -700,7 +762,8 @@ Tcl_ConditionWait(
while (!timeout && (tsdPtr->flags & WIN_THREAD_BLOCKED)) {
ResetEvent(tsdPtr->condEvent);
LeaveCriticalSection(&winCondPtr->condLock);
- if (WaitForSingleObject(tsdPtr->condEvent, wtime) == WAIT_TIMEOUT) {
+ if (WaitForSingleObjectEx(tsdPtr->condEvent, wtime,
+ TRUE) == WAIT_TIMEOUT) {
timeout = 1;
}
EnterCriticalSection(&winCondPtr->condLock);
@@ -765,9 +828,14 @@ Tcl_ConditionNotify(
{
WinCondition *winCondPtr;
ThreadSpecificData *tsdPtr;
+
if (*condPtr != NULL) {
winCondPtr = *((WinCondition **)condPtr);
+ if (winCondPtr == NULL) {
+ return;
+ }
+
/*
* Loop through all the threads waiting on the condition and notify
* them (i.e., broadcast semantics). The queue manipulation is guarded
@@ -817,7 +885,8 @@ FinalizeConditionEvent(
ClientData data)
{
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) data;
- tsdPtr->flags = WIN_THREAD_DEAD;
+
+ tsdPtr->flags = WIN_THREAD_UNINIT;
CloseHandle(tsdPtr->condEvent);
}
@@ -855,11 +924,14 @@ TclpFinalizeCondition(
if (winCondPtr != NULL) {
DeleteCriticalSection(&winCondPtr->condLock);
- ckfree((char *) winCondPtr);
+ ckfree(winCondPtr);
*condPtr = NULL;
}
}
+
+
+
/*
* Additions by AOL for specialized thread memory allocator.
*/
@@ -868,9 +940,9 @@ TclpFinalizeCondition(
Tcl_Mutex *
TclpNewAllocMutex(void)
{
- struct allocMutex *lockPtr;
+ allocMutex *lockPtr;
- lockPtr = malloc(sizeof(struct allocMutex));
+ lockPtr = malloc(sizeof(allocMutex));
if (lockPtr == NULL) {
Tcl_Panic("could not allocate lock");
}
@@ -892,27 +964,27 @@ TclpFreeAllocMutex(
free(lockPtr);
}
-void *
-TclpGetAllocCache(void)
+void
+TclpInitAllocCache(void)
{
- VOID *result;
-
- if (!once) {
- /*
- * We need to make sure that TclpFreeAllocCache is called on each
- * thread that calls this, but only on threads that call this.
- */
+ /*
+ * We need to make sure that TclpFreeAllocCache is called on each
+ * thread that calls this, but only on threads that call this.
+ */
- tlsKey = TlsAlloc();
- once = 1;
- if (tlsKey == TLS_OUT_OF_INDEXES) {
- Tcl_Panic("could not allocate thread local storage");
- }
+ tlsKey = TlsAlloc();
+ if (tlsKey == TLS_OUT_OF_INDEXES) {
+ Tcl_Panic("could not allocate thread local storage");
}
+}
+void *
+TclpGetAllocCache(void)
+{
+ void *result;
result = TlsGetValue(tlsKey);
if ((result == NULL) && (GetLastError() != NO_ERROR)) {
- Tcl_Panic("TlsGetValue failed from TclpGetAllocCache!");
+ Tcl_Panic("TlsGetValue failed from TclpGetAllocCache");
}
return result;
}
@@ -924,7 +996,7 @@ TclpSetAllocCache(
BOOL success;
success = TlsSetValue(tlsKey, ptr);
if (!success) {
- Tcl_Panic("TlsSetValue failed from TclpSetAllocCache!");
+ Tcl_Panic("TlsSetValue failed from TclpSetAllocCache");
}
}
@@ -936,16 +1008,18 @@ TclpFreeAllocCache(
if (ptr != NULL) {
/*
- * Called by us in TclpFinalizeThreadData when a thread exits and
- * destroys the tsd key which stores allocator caches.
+ * Called by TclFinalizeThreadAlloc() and
+ * TclFinalizeThreadAllocThread() during Tcl_Finalize() or
+ * Tcl_FinalizeThread(). This function destroys the tsd key which
+ * stores allocator caches in thread local storage.
*/
TclFreeAllocCache(ptr);
success = TlsSetValue(tlsKey, NULL);
if (!success) {
- Tcl_Panic("TlsSetValue failed from TclpFreeAllocCache!");
+ Tcl_Panic("TlsSetValue failed from TclpFreeAllocCache");
}
- } else if (once) {
+ } else {
/*
* Called by us in TclFinalizeThreadAlloc() during the library
* finalization initiated from Tcl_Finalize()
@@ -953,13 +1027,66 @@ TclpFreeAllocCache(
success = TlsFree(tlsKey);
if (!success) {
- Tcl_Panic("TlsFree failed from TclpFreeAllocCache!");
+ Tcl_Panic("TlsFree failed from TclpFreeAllocCache");
}
- once = 0; /* reset for next time. */
}
-
}
#endif /* USE_THREAD_ALLOC */
+
+
+void *
+TclpThreadCreateKey(void)
+{
+ DWORD *key;
+
+ key = TclpSysAlloc(sizeof *key, 0);
+ if (key == NULL) {
+ Tcl_Panic("unable to allocate thread key!");
+ }
+
+ *key = TlsAlloc();
+
+ if (*key == TLS_OUT_OF_INDEXES) {
+ Tcl_Panic("unable to allocate thread-local storage");
+ }
+
+ return key;
+}
+
+void
+TclpThreadDeleteKey(
+ void *keyPtr)
+{
+ DWORD *key = keyPtr;
+
+ if (!TlsFree(*key)) {
+ Tcl_Panic("unable to delete key");
+ }
+
+ TclpSysFree(keyPtr);
+}
+
+void
+TclpThreadSetMasterTSD(
+ void *tsdKeyPtr,
+ void *ptr)
+{
+ DWORD *key = tsdKeyPtr;
+
+ if (!TlsSetValue(*key, ptr)) {
+ Tcl_Panic("unable to set master TSD value");
+ }
+}
+
+void *
+TclpThreadGetMasterTSD(
+ void *tsdKeyPtr)
+{
+ DWORD *key = tsdKeyPtr;
+
+ return TlsGetValue(*key);
+}
+
#endif /* TCL_THREADS */
/*
generated by cgit v0.12 at 2025-11-01 10:18:48 (GMT)