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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /*
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- #include "primpl.h"
- #include <process.h> /* for _beginthreadex() */
-
- extern void _PR_Win32InitTimeZone(void); /* defined in ntmisc.c */
-
- /* --- globals ------------------------------------------------ */
- PRLock *_pr_schedLock = NULL;
- _PRInterruptTable _pr_interruptTable[] = { { 0 } };
- __declspec(thread) PRThread *_pr_current_fiber;
- __declspec(thread) PRThread *_pr_fiber_last_run;
- __declspec(thread) _PRCPU *_pr_current_cpu;
- __declspec(thread) PRUintn _pr_ints_off;
-
- _MDLock _nt_idleLock;
- PRCList _nt_idleList;
- PRUint32 _nt_idleCount;
-
- extern __declspec(thread) PRThread *_pr_io_restarted_io;
-
- /* Must check the restarted_io *before* decrementing no_sched to 0 */
- #define POST_SWITCH_WORK() \
- if (_pr_io_restarted_io) \
- _nt_handle_restarted_io(_pr_io_restarted_io); \
- _PR_MD_LAST_THREAD()->no_sched = 0;
-
- void
- _nt_handle_restarted_io(PRThread *restarted_io)
- {
- /* After the switch we can resume an IO if needed.
- * XXXMB - this needs to be done in create thread, since that could
- * be the result for a context switch too..
- */
- PR_ASSERT(restarted_io->io_suspended == PR_TRUE);
-
- _PR_THREAD_LOCK(restarted_io);
- if (restarted_io->io_pending == PR_FALSE) {
-
- /* The IO already completed, put us back on the runq. */
- int pri = restarted_io->priority;
-
- restarted_io->state = _PR_RUNNABLE;
- _PR_RUNQ_LOCK(restarted_io->cpu);
- _PR_ADD_RUNQ(restarted_io, restarted_io->cpu, pri);
- _PR_RUNQ_UNLOCK(restarted_io->cpu);
- } else {
- _PR_SLEEPQ_LOCK(restarted_io->cpu);
- _PR_ADD_SLEEPQ(restarted_io, restarted_io->sleep);
- _PR_SLEEPQ_UNLOCK(restarted_io->cpu);
- }
- restarted_io->io_suspended = PR_FALSE;
-
- _PR_THREAD_UNLOCK(restarted_io);
-
- _pr_io_restarted_io = NULL;
- }
-
- void
- _PR_MD_EARLY_INIT()
- {
- _MD_NEW_LOCK( &_nt_idleLock );
- _nt_idleCount = 0;
- PR_INIT_CLIST(&_nt_idleList);
- _PR_Win32InitTimeZone();
-
- #if 0
- /* Make the clock tick at least once per millisecond */
- if ( timeBeginPeriod(1) == TIMERR_NOCANDO) {
- /* deep yoghurt; clock doesn't tick fast enough! */
- PR_ASSERT(0);
- }
- #endif
- }
-
- void _PR_MD_CLEANUP_BEFORE_EXIT(void)
- {
- WSACleanup();
- }
-
- void
- _PR_MD_INIT_PRIMORDIAL_THREAD(PRThread *thread)
- {
- /*
- ** Warning:
- ** --------
- ** NSPR requires a real handle to every thread. GetCurrentThread()
- ** returns a pseudo-handle which is not suitable for some thread
- ** operations (ie. suspending). Therefore, get a real handle from
- ** the pseudo handle via DuplicateHandle(...)
- */
- DuplicateHandle( GetCurrentProcess(), /* Process of source handle */
- GetCurrentThread(), /* Pseudo Handle to dup */
- GetCurrentProcess(), /* Process of handle */
- &(thread->md.handle), /* resulting handle */
- 0L, /* access flags */
- FALSE, /* Inheritable */
- DUPLICATE_SAME_ACCESS ); /* Options */
- }
-
- PRStatus
- _PR_MD_INIT_THREAD(PRThread *thread)
- {
- /* Create the blocking IO semaphore */
- thread->md.blocked_sema = CreateSemaphore(NULL, 0, 1, NULL);
- if (thread->md.blocked_sema == NULL)
- return PR_FAILURE;
- else
- return PR_SUCCESS;
- }
-
- PRStatus
- _PR_MD_CREATE_THREAD(PRThread *thread,
- void (*start)(void *),
- PRThreadPriority priority,
- PRThreadScope scope,
- PRThreadState state,
- PRUint32 stackSize)
- {
-
- #if 0
- thread->md.handle = CreateThread(
- NULL, /* security attrib */
- thread->stack->stackSize, /* stack size */
- (LPTHREAD_START_ROUTINE)start, /* startup routine */
- (void *)thread, /* thread param */
- CREATE_SUSPENDED, /* create flags */
- &(thread->id) ); /* thread id */
- #else
- thread->md.handle = (HANDLE) _beginthreadex(
- NULL,
- thread->stack->stackSize,
- (unsigned (__stdcall *)(void *))start,
- (void *)thread,
- CREATE_SUSPENDED,
- &(thread->id));
- #endif
- if(!thread->md.handle) {
- PRErrorCode prerror;
- thread->md.fiber_last_error = GetLastError();
- switch (errno) {
- case ENOMEM:
- prerror = PR_OUT_OF_MEMORY_ERROR;
- break;
- case EAGAIN:
- prerror = PR_INSUFFICIENT_RESOURCES_ERROR;
- break;
- case EINVAL:
- prerror = PR_INVALID_ARGUMENT_ERROR;
- break;
- default:
- prerror = PR_UNKNOWN_ERROR;
- }
- PR_SetError(prerror, errno);
- return PR_FAILURE;
- }
-
- thread->md.id = thread->id;
-
- /* Activate the thread */
- if ( ResumeThread( thread->md.handle ) != -1)
- return PR_SUCCESS;
-
- PR_SetError(PR_UNKNOWN_ERROR, GetLastError());
- return PR_FAILURE;
- }
-
- void
- _PR_MD_YIELD(void)
- {
- /* Can NT really yield at all? */
- Sleep(0);
- }
-
- void
- _PR_MD_SET_PRIORITY(_MDThread *thread, PRThreadPriority newPri)
- {
- #if 0
- /* XXXMB - does this work? Should we really set the priorities of
- * native threads? */
- if( newPri < 4 ) {
- newPri = (PRUintn)THREAD_PRIORITY_IDLE;
- } else if( newPri < 8 ) {
- newPri = (PRUintn)THREAD_PRIORITY_LOWEST;
- } else if( newPri < 12 ) {
- newPri = (PRUintn)THREAD_PRIORITY_BELOW_NORMAL;
- } else if( newPri < 16 ) {
- newPri = (PRUintn)THREAD_PRIORITY_NORMAL;
- } else if( newPri < 24 ) {
- newPri = (PRUintn)THREAD_PRIORITY_ABOVE_NORMAL;
- } else if( newPri < 28 ) {
- newPri = (PRUintn)THREAD_PRIORITY_HIGHEST;
- } else if( newPri < 32 ) {
- newPri = (PRUintn)THREAD_PRIORITY_TIME_CRITICAL;
- }
-
- if( ! SetThreadPriority( thread->handle, newPri ) ) {
- PR_LOG(_pr_thread_lm, PR_LOG_MIN,
- ("PR_SetThreadPriority: can't set thread priority\n"));
- }
- #endif
-
- return;
- }
-
- void
- _PR_MD_CLEAN_THREAD(PRThread *thread)
- {
- if (thread->md.acceptex_buf) {
- PR_DELETE(thread->md.acceptex_buf);
- }
-
- if (thread->md.xmit_bufs) {
- PR_DELETE(thread->md.xmit_bufs);
- }
-
- if (thread->md.blocked_sema) {
- CloseHandle(thread->md.blocked_sema);
- thread->md.blocked_sema = 0;
- }
-
- if (thread->md.handle) {
- CloseHandle(thread->md.handle);
- thread->md.handle = 0;
- }
-
- /* Don't call DeleteFiber on current fiber or we'll kill the whole thread.
- * Don't call free(thread) until we've switched off the thread.
- * So put this fiber (or thread) on a list to be deleted by the idle
- * fiber next time we have a chance.
- */
- if (!(thread->flags & (_PR_ATTACHED|_PR_GLOBAL_SCOPE))) {
- _MD_LOCK(&_nt_idleLock);
- _nt_idleCount++;
- PR_APPEND_LINK(&thread->links, &_nt_idleList);
- _MD_UNLOCK(&_nt_idleLock);
- }
- }
-
- void
- _PR_MD_EXIT_THREAD(PRThread *thread)
- {
- if (thread->md.acceptex_buf) {
- PR_DELETE(thread->md.acceptex_buf);
- }
-
- if (thread->md.xmit_bufs) {
- PR_DELETE(thread->md.xmit_bufs);
- }
-
- if (thread->md.blocked_sema) {
- CloseHandle(thread->md.blocked_sema);
- thread->md.blocked_sema = 0;
- }
-
- if (thread->md.handle) {
- CloseHandle(thread->md.handle);
- thread->md.handle = 0;
- }
-
- if (thread->flags & _PR_GLOBAL_SCOPE) {
- _MD_SET_CURRENT_THREAD(NULL);
- }
- }
-
-
- void
- _PR_MD_EXIT(PRIntn status)
- {
- _exit(status);
- }
-
- #ifdef HAVE_FIBERS
-
- void
- _pr_fiber_mainline(void *unused)
- {
- PRThread *fiber = _PR_MD_CURRENT_THREAD();
-
- POST_SWITCH_WORK();
-
- fiber->md.fiber_fn(fiber->md.fiber_arg);
- }
-
- PRThread *_PR_MD_CREATE_USER_THREAD(
- PRUint32 stacksize, void (*start)(void *), void *arg)
- {
- PRThread *thread;
-
- if ( (thread = PR_NEW(PRThread)) == NULL ) {
- return NULL;
- }
-
- memset(thread, 0, sizeof(PRThread));
- thread->md.fiber_fn = start;
- thread->md.fiber_arg = arg;
- thread->md.fiber_stacksize = stacksize;
- return thread;
- }
-
- void
- _PR_MD_CREATE_PRIMORDIAL_USER_THREAD(PRThread *thread)
- {
- thread->md.fiber_id = ConvertThreadToFiber(NULL);
- PR_ASSERT(thread->md.fiber_id);
- thread->flags &= (~_PR_GLOBAL_SCOPE);
- _MD_SET_CURRENT_THREAD(thread);
- _MD_SET_LAST_THREAD(thread);
- thread->no_sched = 1;
- return;
- }
-
- void
- _PR_MD_INIT_CONTEXT(PRThread *thread, char *top, void (*start) (void), PRBool *status)
- {
- thread->md.fiber_fn = (void (*)(void *))start;
- thread->md.fiber_id = CreateFiber(thread->md.fiber_stacksize,
- (LPFIBER_START_ROUTINE)_pr_fiber_mainline, NULL);
- if (thread->md.fiber_id != 0)
- *status = PR_TRUE;
- else {
- DWORD oserror = GetLastError();
- PRErrorCode prerror;
- if (oserror == ERROR_NOT_ENOUGH_MEMORY) {
- prerror = PR_OUT_OF_MEMORY_ERROR;
- } else {
- prerror = PR_UNKNOWN_ERROR;
- }
- PR_SetError(prerror, oserror);
- *status = PR_FALSE;
- }
- }
-
- void
- _PR_MD_SWITCH_CONTEXT(PRThread *thread)
- {
- PR_ASSERT( !_PR_IS_NATIVE_THREAD(thread) );
-
- thread->md.fiber_last_error = GetLastError();
- _PR_Schedule();
- }
-
- void
- _PR_MD_RESTORE_CONTEXT(PRThread *thread)
- {
- PRThread *me = _PR_MD_CURRENT_THREAD();
-
- PR_ASSERT( !_PR_IS_NATIVE_THREAD(thread) );
-
- /* The user-level code for yielding will happily add ourselves to the runq
- * and then switch to ourselves; the NT fibers can't handle switching to
- * ourselves.
- */
- if (thread != me) {
- SetLastError(thread->md.fiber_last_error);
- _MD_SET_CURRENT_THREAD(thread);
- _PR_MD_SET_LAST_THREAD(me);
- thread->no_sched = 1;
- SwitchToFiber(thread->md.fiber_id);
- POST_SWITCH_WORK();
- }
- }
-
-
- #endif /* HAVE_FIBERS */
-
- PRInt32 _PR_MD_SETTHREADAFFINITYMASK(PRThread *thread, PRUint32 mask )
- {
- int rv;
-
- rv = SetThreadAffinityMask(thread->md.handle, mask);
-
- return rv?0:-1;
- }
-
- PRInt32 _PR_MD_GETTHREADAFFINITYMASK(PRThread *thread, PRUint32 *mask)
- {
- PRInt32 rv, system_mask;
-
- rv = GetProcessAffinityMask(GetCurrentProcess(), mask, &system_mask);
-
- return rv?0:-1;
- }
-
- void
- _PR_MD_SUSPEND_CPU(_PRCPU *cpu)
- {
- _PR_MD_SUSPEND_THREAD(cpu->thread);
- }
-
- void
- _PR_MD_RESUME_CPU(_PRCPU *cpu)
- {
- _PR_MD_RESUME_THREAD(cpu->thread);
- }
-
- void
- _PR_MD_SUSPEND_THREAD(PRThread *thread)
- {
- if (_PR_IS_NATIVE_THREAD(thread)) {
- /*
- ** There seems to be some doubt about whether or not SuspendThread
- ** is a synchronous function. The test afterwards is to help veriry
- ** that it is, which is what Microsoft says it is.
- */
- PRUintn rv = SuspendThread(thread->md.handle);
- PR_ASSERT(0xffffffffUL != rv);
- }
- }
-
- void
- _PR_MD_RESUME_THREAD(PRThread *thread)
- {
- if (_PR_IS_NATIVE_THREAD(thread)) {
- ResumeThread(thread->md.handle);
- }
- }
-
-