/* -----------------------------------------------------------------------------
- * $Id: Itimer.c,v 1.31 2002/08/16 13:29:06 simonmar Exp $
+ * $Id: Itimer.c,v 1.32 2003/02/22 04:51:50 sof Exp $
*
* (c) The GHC Team, 1995-1999
*
* Hence, we use the old-fashioned @setitimer@ that just about everyone seems
* to support. So much for standards.
*/
-
-/* This is not posix compliant. */
-/* #include "PosixSource.h" */
-
#include "Rts.h"
+#if !defined(mingw32_TARGET_OS) /* to the end */
#include "RtsFlags.h"
+#include "Timer.h"
#include "Itimer.h"
#include "Proftimer.h"
#include "Schedule.h"
# endif
# endif
-#if HAVE_WINDOWS_H
-# include <windows.h>
-#endif
-
#ifdef HAVE_SIGNAL_H
# include <signal.h>
#endif
-static lnat total_ticks = 0;
-
-/* ticks left before next pre-emptive context switch */
-static int ticks_to_ctxt_switch = 0;
-
-/* -----------------------------------------------------------------------------
- Tick handler
-
- We use the ticker for time profiling.
-
- SMP note: this signal could be delivered to *any* thread. We have
- to ensure that it doesn't matter which thread actually runs the
- signal handler.
- -------------------------------------------------------------------------- */
-
-static
-void
-#if defined(mingw32_TARGET_OS) || (defined(cygwin32_TARGET_OS) && !defined(HAVE_SETITIMER))
-
-CALLBACK
-handle_tick(UINT uID STG_UNUSED, UINT uMsg STG_UNUSED, DWORD dwUser STG_UNUSED,
- DWORD dw1 STG_UNUSED, DWORD d STG_UNUSED)
-#else
-handle_tick(int unused STG_UNUSED)
-#endif
-{
- total_ticks++;
-
-#ifdef PROFILING
- handleProfTick();
-#endif
-
- if (RtsFlags.ConcFlags.ctxtSwitchTicks > 0) {
- ticks_to_ctxt_switch--;
- if (ticks_to_ctxt_switch <= 0) {
- ticks_to_ctxt_switch = RtsFlags.ConcFlags.ctxtSwitchTicks;
- context_switch = 1; /* schedule a context switch */
- }
- }
-}
-
-
-/*
- * Handling timer events under cygwin32 is not done with signal/setitimer.
- * Instead of the two steps of first registering a signal handler to handle
- * \tr{SIGVTALRM} and then start generating them via @setitimer()@, we use
- * the Multimedia API (MM) and its @timeSetEvent@. (Internally, the MM API
- * creates a separate thread that will notify the main thread of timer
- * expiry). -- SOF 7/96
- *
- * 11/98: if the cygwin DLL supports setitimer(), then use it instead.
- */
-
-#if defined(mingw32_TARGET_OS) || (defined(cygwin32_TARGET_OS) && !defined(HAVE_SETITIMER))
-
-static LPTIMECALLBACK vtalrm_cback;
-static unsigned int vtalrm_id = 0;
-static unsigned int period = -1;
-
-int
-startVirtTimer(nat ms)
-{
- /* On Win32 setups that don't have support for
- setitimer(), we use the MultiMedia API's timer
- support.
-
- The delivery of ticks isn't free; the performance hit should be checked.
- */
- unsigned int delay;
- TIMECAPS tc;
-
- vtalrm_cback = handle_tick;
-
- if ( timeGetDevCaps(&tc, sizeof(TIMECAPS)) == TIMERR_NOERROR) {
- period = tc.wPeriodMin;
- delay = timeBeginPeriod(period);
- if (delay == TIMERR_NOCANDO) { /* error of some sort. */
- return -1;
- }
- } else {
- return -1;
- }
-
-#ifdef PROFILING
- initProfTimer();
-#endif
-
- vtalrm_id =
- timeSetEvent(ms, /* event every `delay' milliseconds. */
- 1, /* precision is within 1 ms */
- vtalrm_cback,
- TIME_CALLBACK_FUNCTION, /* ordinary callback */
- TIME_PERIODIC);
-
- return 0;
-}
-
-int
-stopVirtTimer()
-{
- /* Shutdown the MM timer */
- if ( vtalrm_id != 0 ) {
- timeKillEvent(vtalrm_id);
- }
- if (period > 0) {
- timeEndPeriod(period);
- }
-
- return 0;
-}
-
-#else
static
int
install_vtalrm_handler(void)
}
int
-startVirtTimer(nat ms)
+startTicker(nat ms)
{
# ifndef HAVE_SETITIMER
/* fprintf(stderr, "No virtual timer on this system\n"); */
timestamp = getourtimeofday();
-#ifdef PROFILING
- initProfTimer();
-#endif
-
it.it_value.tv_sec = ms / 1000;
it.it_value.tv_usec = 1000 * (ms - (1000 * it.it_value.tv_sec));
it.it_interval = it.it_value;
}
int
-stopVirtTimer()
+stopTicker()
{
# ifndef HAVE_SETITIMER
/* fprintf(stderr, "No virtual timer on this system\n"); */
# endif
}
-#endif /* !{mingw,cygwin32}_TARGET_OS */
-
# if 0
/* This is a potential POSIX version */
int
-startVirtTimer(nat ms)
+startTicker(nat ms)
{
struct sigevent se;
struct itimerspec it;
timestamp = getourtimeofday();
-#ifdef PROFILING
- initProfTimer();
-#endif
-
se.sigev_notify = SIGEV_SIGNAL;
se.sigev_signo = SIGVTALRM;
se.sigev_value.sival_int = SIGVTALRM;
}
int
-stopVirtTimer()
+stopTicker()
{
struct sigevent se;
struct itimerspec it;
it.it_interval = it.it_value;
return timer_settime(tid, TIMER_RELTIME, &it, NULL);
}
-
# endif
-#if defined(mingw32_TARGET_OS) || (defined(cygwin32_TARGET_OS) && !defined(HAVE_SETITIMER))
-#else
void
block_vtalrm_signal(void)
{
(void) sigprocmask(SIG_UNBLOCK, &signals, NULL);
}
-#endif
/* gettimeofday() takes around 1us on our 500MHz PIII. Since we're
* only calling it 50 times/s, it shouldn't have any great impact.
*/
-#if !defined(mingw32_TARGET_OS)
unsigned int
getourtimeofday(void)
{
return (tv.tv_sec * TICK_FREQUENCY +
tv.tv_usec * TICK_FREQUENCY / 1000000);
}
-#else
-unsigned int
-getourtimeofday(void)
-{
- return ((unsigned int)GetTickCount() * TICK_FREQUENCY) / 1000;
-}
-#endif
+
+#endif /* !mingw32_TARGET_OS */
/* -----------------------------------------------------------------------------
- * $Id: Itimer.h,v 1.10 2001/11/27 01:51:23 sof Exp $
+ * $Id: Itimer.h,v 1.11 2003/02/22 04:51:51 sof Exp $
*
* (c) The GHC Team 1998-2001
*
* Interval timer for profiling and pre-emptive scheduling.
*
* ---------------------------------------------------------------------------*/
+#ifndef __ITIMER_H__
+#define __ITIMER_H__
-# define TICK_FREQUENCY 50 /* ticks per second */
-# define TICK_MILLISECS (1000/TICK_FREQUENCY) /* ms per tick */
+extern int startTicker( nat ms );
+extern int stopTicker ( void );
-/* Context switch timing constants. Context switches happen after a
- * whole number of ticks, the default being every tick.
- */
-#define CS_MIN_MILLISECS TICK_MILLISECS /* milliseconds per slice */
-
-int startVirtTimer( nat ms );
-int stopVirtTimer ( void );
-void block_vtalrm_signal ( void );
-void unblock_vtalrm_signal ( void );
-unsigned int getourtimeofday ( void );
+extern void block_vtalrm_signal ( void );
+extern void unblock_vtalrm_signal ( void );
+extern unsigned int getourtimeofday ( void );
+#endif /* __ITIMER_H__ */
/* -----------------------------------------------------------------------------
- * $Id: LdvProfile.c,v 1.4 2003/01/30 10:06:35 simonmar Exp $
+ * $Id: LdvProfile.c,v 1.5 2003/02/22 04:51:51 sof Exp $
*
* (c) The GHC Team, 2001
* Author: Sungwoo Park
#include "Rts.h"
#include "LdvProfile.h"
#include "RtsFlags.h"
-#include "Itimer.h"
-#include "Proftimer.h"
#include "Profiling.h"
#include "Stats.h"
#include "Storage.h"
/* -----------------------------------------------------------------------------
- * $Id: PrimOps.hc,v 1.104 2003/02/21 05:34:15 sof Exp $
+ * $Id: PrimOps.hc,v 1.105 2003/02/22 04:51:51 sof Exp $
*
* (c) The GHC Team, 1998-2002
*
#include "BlockAlloc.h" /* tmp */
#include "StablePriv.h"
#include "StgRun.h"
-#include "Itimer.h"
+#include "Timer.h" /* TICK_MILLISECS */
#include "Prelude.h"
+#ifndef mingw32_TARGET_OS
+#include "Itimer.h" /* getourtimeofday() */
+#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
FN_(delayzh_fast)
{
+#ifdef mingw32_TARGET_OS
+ StgAsyncIOResult* ares;
+ unsigned int reqID;
+#else
StgTSO *t, *prev;
nat target;
+#endif
FB_
/* args: R1.i */
ASSERT(CurrentTSO->why_blocked == NotBlocked);
CurrentTSO->why_blocked = BlockedOnDelay;
ACQUIRE_LOCK(&sched_mutex);
-
+#ifdef mingw32_TARGET_OS
+ /* could probably allocate this on the heap instead */
+ ares = (StgAsyncIOResult*)RET_STGCALL2(P_,stgMallocBytes,sizeof(StgAsyncIOResult), "asyncWritezh_fast");
+ reqID = RET_STGCALL1(W_,addDelayRequest,R1.i);
+ ares->reqID = reqID;
+ ares->len = 0;
+ ares->errCode = 0;
+ CurrentTSO->block_info.async_result = ares;
+ APPEND_TO_BLOCKED_QUEUE(CurrentTSO);
+#else
target = (R1.i / (TICK_MILLISECS*1000)) + getourtimeofday();
CurrentTSO->block_info.target = target;
} else {
prev->link = CurrentTSO;
}
-
+#endif
RELEASE_LOCK(&sched_mutex);
JMP_(stg_block_noregs);
FE_
/* -----------------------------------------------------------------------------
- * $Id: Profiling.c,v 1.35 2002/12/19 18:02:13 panne Exp $
+ * $Id: Profiling.c,v 1.36 2003/02/22 04:51:52 sof Exp $
*
* (c) The GHC Team, 1998-2000
*
#include "Profiling.h"
#include "Storage.h"
#include "Proftimer.h"
-#include "Itimer.h"
+#include "Timer.h"
#include "ProfHeap.h"
#include "Arena.h"
#include "RetainerProfile.h"
/* -----------------------------------------------------------------------------
- * $Id: Proftimer.c,v 1.11 2002/12/11 15:36:47 simonmar Exp $
+ * $Id: Proftimer.c,v 1.12 2003/02/22 04:51:52 sof Exp $
*
* (c) The GHC Team, 1998-1999
*
#include "Rts.h"
#include "Profiling.h"
-#include "Itimer.h"
+#include "Timer.h"
#include "Proftimer.h"
#include "RtsFlags.h"
/* -----------------------------------------------------------------------------
- * $Id: RetainerProfile.c,v 1.6 2002/12/11 15:36:47 simonmar Exp $
+ * $Id: RetainerProfile.c,v 1.7 2003/02/22 04:51:52 sof Exp $
*
* (c) The GHC Team, 2001
* Author: Sungwoo Park
#include "Profiling.h"
#include "Stats.h"
#include "BlockAlloc.h"
-#include "Itimer.h"
-#include "Proftimer.h"
#include "ProfHeap.h"
#include "Apply.h"
/* -----------------------------------------------------------------------------
- * $Id: RtsFlags.c,v 1.65 2003/01/28 16:23:53 simonmar Exp $
+ * $Id: RtsFlags.c,v 1.66 2003/02/22 04:51:53 sof Exp $
*
* (c) The AQUA Project, Glasgow University, 1994-1997
* (c) The GHC Team, 1998-1999
#include "RtsFlags.h"
#include "RtsUtils.h"
#include "BlockAlloc.h"
-#include "Itimer.h" /* CS_MIN_MILLISECS */
+#include "Timer.h" /* CS_MIN_MILLISECS */
#include "Profiling.h"
-#if defined(PROFILING)
-#include "Itimer.h"
-#endif
-
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
/* -----------------------------------------------------------------------------
- * $Id: RtsStartup.c,v 1.71 2003/02/21 05:34:15 sof Exp $
+ * $Id: RtsStartup.c,v 1.72 2003/02/22 04:51:53 sof Exp $
*
* (c) The GHC Team, 1998-2002
*
#include "Schedule.h" /* initScheduler */
#include "Stats.h" /* initStats */
#include "Signals.h"
-#include "Itimer.h"
+#include "Timer.h" /* startTimer, stopTimer */
#include "Weak.h"
#include "Ticky.h"
#include "StgRun.h"
#endif
/* start the virtual timer 'subsystem'. */
- startVirtTimer(TICK_MILLISECS);
+ startTimer(TICK_MILLISECS);
/* Initialise the stats department */
initStats();
#endif
/* stop the ticker */
- stopVirtTimer();
+ stopTimer();
/* reset the standard file descriptors to blocking mode */
resetNonBlockingFd(0);
/* ---------------------------------------------------------------------------
- * $Id: Schedule.c,v 1.161 2003/01/25 15:54:49 wolfgang Exp $
+ * $Id: Schedule.c,v 1.162 2003/02/22 04:51:53 sof Exp $
*
* (c) The GHC Team, 1998-2000
*
#include "Signals.h"
#include "Sanity.h"
#include "Stats.h"
-#include "Itimer.h"
+#include "Timer.h"
#include "Prelude.h"
#include "ThreadLabels.h"
#ifdef PROFILING
/* -----------------------------------------------------------------------------
- * $Id: Select.c,v 1.24 2003/02/21 05:34:16 sof Exp $
+ * $Id: Select.c,v 1.25 2003/02/22 04:51:57 sof Exp $
*
* (c) The GHC Team 1995-2002
*
*
* ---------------------------------------------------------------------------*/
+
/* we're outside the realms of POSIX here... */
/* #include "PosixSource.h" */
#include "Rts.h"
+#ifndef mingw32_TARGET_OS
+/* to the end */
+
#include "Schedule.h"
#include "RtsUtils.h"
#include "RtsFlags.h"
-#include "Itimer.h"
+#include "Timer.h"
#include "Signals.h"
#include "Capability.h"
# include <sys/time.h>
# endif
-# ifdef mingw32_TARGET_OS
-# include <windows.h>
-# include "win32/AsyncIO.h"
-# endif
-
#include <errno.h>
#include <string.h>
#ifdef RTS_SUPPORTS_THREADS
static rtsBool isWorkerBlockedInAwaitEvent = rtsFalse;
static rtsBool workerWakeupPending = rtsFalse;
-#ifndef mingw32_TARGET_OS
static int workerWakeupPipe[2];
static rtsBool workerWakeupInited = rtsFalse;
#endif
-#endif
/* There's a clever trick here to avoid problems when the time wraps
* around. Since our maximum delay is smaller than 31 bits of ticks
StgTSO *tso, *prev, *next;
rtsBool ready;
fd_set rfd,wfd;
-#ifndef mingw32_TARGET_OS
int numFound;
int maxfd = -1;
-#endif
rtsBool select_succeeded = rtsTrue;
rtsBool unblock_all = rtsFalse;
struct timeval tv;
min = 0x7ffffff;
}
-#ifndef mingw32_TARGET_OS
/*
* Collect all of the fd's that we're interested in
*/
barf("select failed");
}
}
-#else /* on mingwin */
-#ifdef RTS_SUPPORTS_THREADS
- isWorkerBlockedInAwaitEvent = rtsTrue;
-#endif
- RELEASE_LOCK(&sched_mutex);
- while (1) {
- if (!awaitRequests(wait)) {
- Sleep(0); /* don't busy wait */
- }
-#endif /* mingw32_TARGET_OS */
ACQUIRE_LOCK(&sched_mutex);
#ifdef RTS_SUPPORTS_THREADS
isWorkerBlockedInAwaitEvent = rtsFalse;
#endif
-#ifndef mingw32_TARGET_OS
/* We got a signal; could be one of ours. If so, we need
* to start up the signal handler straight away, otherwise
* we could block for a long time before the signal is
ACQUIRE_LOCK(&sched_mutex);
return; /* still hold the lock */
}
-#endif
/* we were interrupted, return to the scheduler immediately.
*/
}
}
-#if defined(RTS_SUPPORTS_THREADS) && !defined(mingw32_TARGET_OS)
+#if defined(RTS_SUPPORTS_THREADS)
// if we were woken up by wakeBlockedWorkerThread,
// read the dummy byte from the pipe
if(select_succeeded && FD_ISSET(workerWakeupPipe[0], &rfd)) {
* wake it.
* Must be called with sched_mutex held.
*/
-
void
wakeBlockedWorkerThread()
{
-#ifndef mingw32_TARGET_OS
if(isWorkerBlockedInAwaitEvent && !workerWakeupPending) {
unsigned char dummy = 42; // Any value will do here
write(workerWakeupPipe[1],&dummy,1);
workerWakeupPending = rtsTrue;
}
-#else
- // The Win32 implementation currently uses a polling loop,
- // so there is no need to explicitly wake it
-#endif
}
-
#endif
+
+#endif /* !mingw_TARGET_OS */
--- /dev/null
+/* -----------------------------------------------------------------------------
+ *
+ * (c) The GHC Team, 1995-2003
+ *
+ * Interval timer service for profiling and pre-emptive scheduling.
+ *
+ * ---------------------------------------------------------------------------*/
+
+/*
+ * The interval timer is used for profiling and for context switching in the
+ * threaded build.
+ *
+ * This file defines the platform-independent view of interval timing, relying
+ * on platform-specific services to install and run the timers.
+ *
+ */
+#include "Rts.h"
+#include "RtsFlags.h"
+#include "Proftimer.h"
+#include "Schedule.h"
+#include "Timer.h"
+
+#ifndef mingw32_TARGET_OS
+#include "Itimer.h"
+#else
+#include "win32/Ticker.h"
+#endif
+
+/* ticks left before next pre-emptive context switch */
+static int ticks_to_ctxt_switch = 0;
+
+/*
+ * Function: handle_tick()
+ *
+ * At each occurrence of a tick, the OS timer will invoke
+ * handle_tick().
+ */
+void
+handle_tick(int unused STG_UNUSED)
+{
+#ifdef PROFILING
+ handleProfTick();
+#endif
+ if (RtsFlags.ConcFlags.ctxtSwitchTicks > 0) {
+ ticks_to_ctxt_switch--;
+ if (ticks_to_ctxt_switch <= 0) {
+ ticks_to_ctxt_switch = RtsFlags.ConcFlags.ctxtSwitchTicks;
+ context_switch = 1; /* schedule a context switch */
+ }
+ }
+}
+
+int
+startTimer(nat ms)
+{
+#ifdef PROFILING
+ initProfTimer();
+#endif
+
+ return startTicker(ms);
+}
+
+int
+stopTimer()
+{
+ return stopTicker();
+}
--- /dev/null
+/* -----------------------------------------------------------------------------
+ *
+ * (c) The GHC Team, 1995-2003
+ *
+ * Interval timer service for profiling and pre-emptive scheduling.
+ *
+ * ---------------------------------------------------------------------------*/
+#ifndef __TIMER_H__
+#define __TIMER_H__
+
+# define TICK_FREQUENCY 50 /* ticks per second */
+# define TICK_MILLISECS (1000/TICK_FREQUENCY) /* ms per tick */
+
+/* Context switch timing constants. Context switches happen after a
+ * whole number of ticks, the default being every tick.
+ */
+#define CS_MIN_MILLISECS TICK_MILLISECS /* milliseconds per slice */
+
+extern void handle_tick(int unused);
+extern int startTimer(nat ms);
+extern int stopTimer(void);
+#endif /* __TIMER_H__ */
#endif
#endif
#ifdef mingw32_TARGET_OS
- ,"winmm" /* for the threadDelay timer */
,"wsock32" /* for the linker */
#endif
#if defined(DEBUG) && defined(HAVE_LIBBFD)
static CRITICAL_SECTION queue_lock;
static HANDLE completed_req_event;
+static HANDLE abandon_req_wait;
+static HANDLE wait_handles[2];
static CompletedReq completedTable[MAX_REQUESTS];
static int completed_hw;
static int issued_reqs;
return AddIORequest(fd,forWriting,isSock,len,buf,0,onIOComplete);
}
+unsigned int
+addDelayRequest(int msecs)
+{
+ EnterCriticalSection(&queue_lock);
+ issued_reqs++;
+ LeaveCriticalSection(&queue_lock);
+#if 0
+ fprintf(stderr, "addDelayReq: %d %d %d\n", msecs); fflush(stderr);
+#endif
+ return AddDelayRequest(msecs,0,onIOComplete);
+}
+
int
startupAsyncIO()
{
return 0;
}
InitializeCriticalSection(&queue_lock);
- completed_req_event = CreateEvent (NULL, TRUE, FALSE, NULL);
+ /* Create a pair of events:
+ *
+ * - completed_req_event -- signals the deposit of request result; manual reset.
+ * - abandon_req_wait -- external OS thread tells current RTS/Scheduler
+ * thread to abandon wait for IO request completion.
+ * Auto reset.
+ */
+ completed_req_event = CreateEvent (NULL, TRUE, FALSE, NULL);
+ abandon_req_wait = CreateEvent (NULL, FALSE, FALSE, NULL);
+ wait_handles[0] = completed_req_event;
+ wait_handles[1] = abandon_req_wait;
completed_hw = 0;
- return 1;
+ return ( completed_req_event != INVALID_HANDLE_VALUE &&
+ abandon_req_wait != INVALID_HANDLE_VALUE );
}
void
/* empty table, drop lock and wait */
LeaveCriticalSection(&queue_lock);
if (wait) {
- WaitForSingleObject( completed_req_event, INFINITE );
+ DWORD dwRes = WaitForMultipleObjects(2, wait_handles, FALSE, INFINITE);
+ switch (dwRes) {
+ case WAIT_OBJECT_0:
+ break;
+ case WAIT_OBJECT_0 + 1:
+ case WAIT_TIMEOUT:
+ return 0;
+ default:
+ fprintf(stderr, "awaitRequests: unexpected wait return code %lu\n", dwRes); fflush(stderr);
+ return 0;
+ }
} else {
return 0; /* cannot happen */
}
prev = NULL;
for(tso = blocked_queue_hd ; tso != END_TSO_QUEUE; tso = tso->link) {
switch(tso->why_blocked) {
+ case BlockedOnDelay:
case BlockedOnRead:
case BlockedOnWrite:
if (tso->block_info.async_result->reqID == rID) {
/* Found the thread blocked waiting on request; stodgily fill
* in its result block.
*/
- tso->block_info.async_result->len = completedTable[i].len;
- tso->block_info.async_result->errCode = completedTable[i].errCode;
+ if (tso->why_blocked != BlockedOnDelay) {
+ tso->block_info.async_result->len = completedTable[i].len;
+ tso->block_info.async_result->errCode = completedTable[i].errCode;
+ }
/* Drop the matched TSO from blocked_queue */
if (prev) {
return 1;
}
}
+
+void
+abandonRequestWait()
+{
+ /* the event is auto-reset, but in case there's no thread
+ * already waiting on the event, we want to return it to
+ * a non-signalled state.
+ */
+ PulseEvent(abandon_req_wait);
+}
int isSock,
int len,
char* buf);
-
+extern unsigned int addDelayRequest(int msecs);
extern int startupAsyncIO(void);
extern void shutdownAsyncIO(void);
extern int awaitRequests(rtsBool wait);
+extern void abandonRequestWait(void);
+
#endif /* __ASYNCHIO_H__ */
--- /dev/null
+/*
+ * Wait/check for external events. Periodically, the
+ * Scheduler checks for the completion of external operations,
+ * like the expiration of timers, completion of I/O requests
+ * issued by Haskell threads.
+ *
+ * If the Scheduler is otherwise out of work, it'll block
+ * herein waiting for external events to occur.
+ *
+ * This file mirrors the select()-based functionality
+ * for POSIX / Unix platforms in rts/Select.c, but for
+ * Win32.
+ *
+ */
+#include "Rts.h"
+#include "Schedule.h"
+#include <windows.h>
+#include "win32/AsyncIO.h"
+
+void
+awaitEvent(rtsBool wait)
+{
+ RELEASE_LOCK(&sched_mutex);
+ do {
+ /* Try to de-queue completed IO requests */
+ if (!awaitRequests(wait)) {
+ return;
+ }
+ ACQUIRE_LOCK(&sched_mutex);
+ /* we were interrupted, return to the scheduler immediately.
+ */
+ if (interrupted) {
+ return; /* still hold the lock */
+ }
+
+ /* If new runnable threads have arrived, stop waiting for
+ * I/O and run them.
+ */
+ if (run_queue_hd != END_TSO_QUEUE) {
+ return; /* still hold the lock */
+ }
+
+#ifdef RTS_SUPPORTS_THREADS
+ /* If another worker thread wants to take over,
+ * return to the scheduler
+ */
+ if (needToYieldToReturningWorker()) {
+ return; /* still hold the lock */
+ }
+#endif
+ RELEASE_LOCK(&sched_mutex);
+ } while (wait && !interrupted && run_queue_hd == END_TSO_QUEUE);
+}
+
+#ifdef RTS_SUPPORTS_THREADS
+void
+wakeBlockedWorkerThread()
+{
+ abandonRequestWait();
+}
+#endif
+
(LPVOID)iom,
0,
NULL) );
- //CreateThread( NULL, 0, IOWorkerProc, (LPVOID)iom, 0, NULL));
}
BOOL
--- /dev/null
+/*
+ * RTS periodic timers.
+ *
+ */
+#include "Rts.h"
+#include "Timer.h"
+#include "Ticker.h"
+#include <windows.h>
+#include <stdio.h>
+#include <process.h>
+
+/*
+ * Provide a timer service for the RTS, periodically
+ * notifying it that a number of 'ticks' has passed.
+ *
+ */
+
+/* To signal shutdown of the timer service, we use a local
+ * event which the timer thread listens to (and stopVirtTimer()
+ * signals.)
+ */
+static HANDLE hStopEvent = INVALID_HANDLE_VALUE;
+
+/*
+ * Ticking is done by a separate thread which periodically
+ * wakes up to handle a tick.
+ *
+ * This is the portable way of providing a timer service under
+ * Win32; features like waitable timers or timer queues are only
+ * supported by a subset of the Win32 platforms (notably not
+ * under Win9x.)
+ *
+ */
+static
+unsigned
+WINAPI
+TimerProc(PVOID param)
+{
+ int ms = (int)param;
+ DWORD waitRes;
+
+ /* interpret a < 0 timeout period as 'instantaneous' */
+ if (ms < 0) ms = 0;
+
+ while (1) {
+ waitRes = WaitForSingleObject(hStopEvent, ms);
+
+ switch (waitRes) {
+ case WAIT_OBJECT_0:
+ /* event has become signalled */
+ CloseHandle(hStopEvent);
+ return 0;
+ case WAIT_TIMEOUT:
+ /* tick */
+ handle_tick(0);
+ break;
+ default:
+ fprintf(stderr, "timer: unexpected result %lu\n", waitRes); fflush(stderr);
+ break;
+ }
+ }
+ return 0;
+}
+
+
+int
+startTicker(nat ms)
+{
+
+ /* 'hStopEvent' is a manual-reset event that's signalled upon
+ * shutdown of timer service (=> timer thread.)
+ */
+ hStopEvent = CreateEvent ( NULL,
+ TRUE,
+ FALSE,
+ NULL);
+ if (hStopEvent == INVALID_HANDLE_VALUE) {
+ return 0;
+ }
+ return ( 0 != _beginthreadex(NULL,
+ 0,
+ TimerProc,
+ (LPVOID)ms,
+ 0,
+ NULL) );
+}
+
+int
+stopTicker(void)
+{
+ if (hStopEvent != INVALID_HANDLE_VALUE) {
+ SetEvent(hStopEvent);
+ }
+ return 0;
+}
--- /dev/null
+/*
+ * RTS periodic timers (win32)
+ */
+#ifndef __TICKER_H__
+#define __TICKER_H__
+extern int startTicker( nat ms );
+extern int stopTicker ( void );
+#endif /* __TICKER_H__ */
+
projects / ghc-hetmet.git / commitdiff