/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape Portable Runtime (NSPR).
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "primpl.h"
#include <process.h> /* for _beginthreadex() */
/* --- globals ------------------------------------------------ */
PRLock *_pr_schedLock = NULL;
_PRInterruptTable _pr_interruptTable[] = { { 0 } };
BOOL _pr_use_static_tls = TRUE;
__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;
DWORD _pr_currentFiberIndex;
DWORD _pr_lastFiberIndex;
DWORD _pr_currentCPUIndex;
DWORD _pr_intsOffIndex;
_MDLock _nt_idleLock;
PRCList _nt_idleList;
PRUint32 _nt_idleCount;
extern __declspec(thread) PRThread *_pr_io_restarted_io;
extern DWORD _pr_io_restartedIOIndex;
/* Must check the restarted_io *before* decrementing no_sched to 0 */
#define POST_SWITCH_WORK() \
PR_BEGIN_MACRO \
PRThread *restarted_io = \
(_pr_use_static_tls ? _pr_io_restarted_io \
: (PRThread *) TlsGetValue(_pr_io_restartedIOIndex)); \
if (restarted_io) { \
_nt_handle_restarted_io(restarted_io); \
} \
_PR_MD_LAST_THREAD()->no_sched = 0; \
PR_END_MACRO
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_ASSERT(restarted_io->md.thr_bound_cpu == restarted_io->cpu);
_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;
restarted_io->md.thr_bound_cpu = NULL;
_PR_THREAD_UNLOCK(restarted_io);
if (_pr_use_static_tls) {
_pr_io_restarted_io = NULL;
} else {
TlsSetValue(_pr_io_restartedIOIndex, NULL);
}
}
void
_PR_MD_EARLY_INIT()
{
_MD_NEW_LOCK( &_nt_idleLock );
_nt_idleCount = 0;
PR_INIT_CLIST(&_nt_idleList);
#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
if (!_pr_use_static_tls) {
_pr_currentFiberIndex = TlsAlloc();
_pr_lastFiberIndex = TlsAlloc();
_pr_currentCPUIndex = TlsAlloc();
_pr_intsOffIndex = TlsAlloc();
_pr_io_restartedIOIndex = TlsAlloc();
}
}
void _PR_MD_CLEANUP_BEFORE_EXIT(void)
{
_PR_NT_FreeSids();
WSACleanup();
if (!_pr_use_static_tls) {
TlsFree(_pr_currentFiberIndex);
TlsFree(_pr_lastFiberIndex);
TlsFree(_pr_currentCPUIndex);
TlsFree(_pr_intsOffIndex);
TlsFree(_pr_io_restartedIOIndex);
}
}
PRStatus
_PR_MD_INIT_THREAD(PRThread *thread)
{
thread->md.overlapped.ioModel = _MD_BlockingIO;
thread->md.overlapped.data.mdThread = &thread->md;
if (thread->flags & _PR_GLOBAL_SCOPE) {
if (thread->flags & (_PR_PRIMORDIAL | _PR_ATTACHED)) {
/*
** Warning:
** --------
** NSPR requires a real handle to every thread.
** GetCurrentThread() returns a pseudo-handle which
** is not suitable for some thread operations (e.g.,
** 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 */
}
/* Create the blocking IO semaphore */
thread->md.blocked_sema = CreateSemaphore(NULL, 0, 1, NULL);
if (thread->md.blocked_sema == NULL) {
return PR_FAILURE;
}
if (_native_threads_only) {
/* Create the blocking IO semaphore */
thread->md.thr_event = CreateEvent(NULL, TRUE, FALSE, NULL);
if (thread->md.thr_event == NULL) {
return PR_FAILURE;
}
}
}
return PR_SUCCESS;
}
static unsigned __stdcall
pr_root(void *arg)
{
PRThread *thread = (PRThread *)arg;
thread->md.start(thread);
return 0;
}
PRStatus
_PR_MD_CREATE_THREAD(PRThread *thread,
void (*start)(void *),
PRThreadPriority priority,
PRThreadScope scope,
PRThreadState state,
PRUint32 stackSize)
{
thread->md.start = start;
thread->md.handle = (HANDLE) _beginthreadex(
NULL,
thread->stack->stackSize,
pr_root,
(void *)thread,
CREATE_SUSPENDED,
&(thread->id));
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;
/*
* On windows, a thread is created with a thread priority of
* THREAD_PRIORITY_NORMAL.
*/
if (priority != PR_PRIORITY_NORMAL) {
_PR_MD_SET_PRIORITY(&(thread->md), priority);
}
/* Activate the thread */
if ( ResumeThread( thread->md.handle ) != -1)
return PR_SUCCESS;
PR_SetError(PR_UNKNOWN_ERROR, GetLastError());
return PR_FAILURE;
}
void
_PR_MD_JOIN_THREAD(_MDThread *md)
{
DWORD rv;
rv = WaitForSingleObject(md->handle, INFINITE);
PR_ASSERT(WAIT_OBJECT_0 == rv);
}
void
_PR_MD_END_THREAD(void)
{
_endthreadex(0);
}
void
_PR_MD_YIELD(void)
{
/* Can NT really yield at all? */
Sleep(0);
}
void
_PR_MD_SET_PRIORITY(_MDThread *thread, PRThreadPriority newPri)
{
int nativePri;
BOOL rv;
if (newPri < PR_PRIORITY_FIRST) {
newPri = PR_PRIORITY_FIRST;
} else if (newPri > PR_PRIORITY_LAST) {
newPri = PR_PRIORITY_LAST;
}
switch (newPri) {
case PR_PRIORITY_LOW:
nativePri = THREAD_PRIORITY_BELOW_NORMAL;
break;
case PR_PRIORITY_NORMAL:
nativePri = THREAD_PRIORITY_NORMAL;
break;
case PR_PRIORITY_HIGH:
nativePri = THREAD_PRIORITY_ABOVE_NORMAL;
break;
case PR_PRIORITY_URGENT:
nativePri = THREAD_PRIORITY_HIGHEST;
}
rv = SetThreadPriority(thread->handle, nativePri);
PR_ASSERT(rv);
if (!rv) {
PR_LOG(_pr_thread_lm, PR_LOG_MIN,
("PR_SetThreadPriority: can't set thread priority\n"));
}
return;
}
void
_PR_MD_CLEAN_THREAD(PRThread *thread)
{
BOOL rv;
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) {
rv = CloseHandle(thread->md.blocked_sema);
PR_ASSERT(rv);
thread->md.blocked_sema = 0;
}
if (_native_threads_only) {
if (thread->md.thr_event) {
rv = CloseHandle(thread->md.thr_event);
PR_ASSERT(rv);
thread->md.thr_event = 0;
}
}
if (thread->md.handle) {
rv = CloseHandle(thread->md.handle);
PR_ASSERT(rv);
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)
{
BOOL rv;
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) {
rv = CloseHandle(thread->md.blocked_sema);
PR_ASSERT(rv);
thread->md.blocked_sema = 0;
}
if (_native_threads_only) {
if (thread->md.thr_event) {
rv = CloseHandle(thread->md.thr_event);
PR_ASSERT(rv);
thread->md.thr_event = 0;
}
}
if (thread->md.handle) {
rv = CloseHandle(thread->md.handle);
PR_ASSERT(rv);
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);
_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);
}
}
PRThread*
_MD_CURRENT_THREAD(void)
{
PRThread *thread;
thread = _MD_GET_ATTACHED_THREAD();
if (NULL == thread) {
thread = _PRI_AttachThread(
PR_USER_THREAD, PR_PRIORITY_NORMAL, NULL, 0);
}
PR_ASSERT(thread != NULL);
return thread;
}
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