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gcc/libjava/win32-threads.cc
Bryce McKinlay e301621d19 For boehm-gc:
* configure.in: Rename THREADLIB to THREADLIBS.
	* Makefile.am (LINK): Add $(THREADLIBS) to libtool command line. This
	ensures that we link the correct version of the linuxthreads semaphore
	functions.
	* Makefile.in: Rebuilt.
	* configure: Rebuilt.

	* linux_thread.c (GC_thr_init, GC_suspend_handler): Add SIGABRT to the
	list of signals which are not blocked during suspend in the NO_SIGNALS
	case.

For libjava:
	* Makefile.am (libgcj_la_LIBADD): Add $(THREADLIBS). This ensures that
	the correct versions of various linuxthreads functions get linked.
	* Makefile.in: Rebuilt.
	* java/lang/natThread.cc (finalize_native): New static function. Call
	_Jv_ThreadDestroyData.
	(initialize_native): Register finalizer for "data".
	* include/posix-threads.h (_Jv_ThreadInitData): New simpler prototype.
	(_Jv_ThreadDestroyData): New prototype.
	* include/win32-threads.h: Ditto.
	* include/no-threads.h: Ditto.
	* posix-threads.cc (_Jv_ThreadInitData): Implement new prototype.
	(_Jv_ThreadDestroyData): New function. Free native thread "data" and
	move mutex and condition variable destroy code from:
	(really_start): ...here.
	(_Jv_ThreadStart): Set PTHREAD_CREATE_DETACHED.
	* win32-threads.cc (_Jv_ThreadInitData): Implement new prototype.
	(_Jv_ThreadDestroyData): Implemented.
	* nogc.cc (_Jv_AllocObject): Use "void *" not "ptr_t".
	(_Jv_AllocArray): Ditto.

From-SVN: r38557
2000-12-30 12:18:39 +00:00

251 lines
5.2 KiB
C++

// win32-threads.cc - interface between libjava and Win32 threads.
/* Copyright (C) 1998, 1999 Red Hat, Inc.
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
#include <config.h>
// If we're using the Boehm GC, then we need to override some of the
// thread primitives. This is fairly gross.
#ifdef HAVE_BOEHM_GC
extern "C"
{
#include <boehm-config.h>
#include <gc.h>
};
#endif /* HAVE_BOEHM_GC */
#include <gcj/cni.h>
#include <jvm.h>
#include <java/lang/Thread.h>
#include <java/lang/System.h>
#include <errno.h>
#ifndef ETIMEDOUT
#define ETIMEDOUT 116
#endif
// This is used to implement thread startup.
struct starter
{
_Jv_ThreadStartFunc *method;
java::lang::Thread *object;
_Jv_Thread_t *data;
};
// Controls access to the variable below
static HANDLE daemon_mutex;
static HANDLE daemon_cond;
// Number of non-daemon threads - _Jv_ThreadWait returns when this is 0
static int non_daemon_count;
// TLS key get Java object representing the thread
DWORD _Jv_ThreadKey;
// TLS key to get _Jv_Thread_t* representing the thread
DWORD _Jv_ThreadDataKey;
//
// These are the flags that can appear in _Jv_Thread_t.
//
// Thread started.
#define FLAG_START 0x01
// Thread is daemon.
#define FLAG_DAEMON 0x02
//
// Condition variables.
//
int
_Jv_CondWait (_Jv_ConditionVariable_t *cv, _Jv_Mutex_t *mu, jlong millis, jint nanos)
{
DWORD time;
DWORD rval;
// FIXME: check for mutex ownership?
_Jv_MutexUnlock (mu);
if((millis == 0) && (nanos > 0))
time = 1;
else if(millis == 0)
time = INFINITE;
else
time = millis;
rval = WaitForSingleObject (*cv, time);
_Jv_MutexLock (mu);
if (rval == WAIT_FAILED)
return _JV_NOT_OWNER; // FIXME?
else
return 0;
}
//
// Mutexes.
//
int
_Jv_MutexLock (_Jv_Mutex_t *mu)
{
DWORD rval;
// FIXME: Are Win32 mutexs recursive? Should we use critical section objects
rval = WaitForSingleObject (*mu, INFINITE);
if (rval == WAIT_FAILED)
return GetLastError (); // FIXME: Map to errno?
else if (rval == WAIT_TIMEOUT)
return ETIMEDOUT;
else
return 0;
}
//
// Threads.
//
void
_Jv_InitThreads (void)
{
_Jv_ThreadKey = TlsAlloc();
_Jv_ThreadDataKey = TlsAlloc();
daemon_mutex = CreateMutex(NULL, 0, NULL);
daemon_cond = CreateEvent(NULL, 0, 0, NULL);
non_daemon_count = 0;
}
_Jv_Thread_t *
_Jv_ThreadInitData (java::lang::Thread *)
{
_Jv_Thread_t *data = new _Jv_Thread_t;
data->flags = 0;
return data;
}
void
_Jv_ThreadDestroyData (_Jv_Thread_t *data)
{
delete data;
}
void
_Jv_ThreadSetPriority (_Jv_Thread_t *data, jint prio)
{
int actual = THREAD_PRIORITY_NORMAL;
if (data->flags & FLAG_START)
{
switch (prio)
{
case 10:
actual = THREAD_PRIORITY_TIME_CRITICAL;
break;
case 9:
actual = THREAD_PRIORITY_HIGHEST;
break;
case 8:
case 7:
actual = THREAD_PRIORITY_ABOVE_NORMAL;
break;
case 6:
case 5:
actual = THREAD_PRIORITY_NORMAL;
break;
case 4:
case 3:
actual = THREAD_PRIORITY_BELOW_NORMAL;
break;
case 2:
actual = THREAD_PRIORITY_LOWEST;
break;
case 1:
actual = THREAD_PRIORITY_IDLE;
break;
}
SetThreadPriority(data->handle, actual);
}
}
// This function is called when a thread is started. We don't arrange
// to call the `run' method directly, because this function must
// return a value.
static DWORD __stdcall
really_start (void* x)
{
struct starter *info = (struct starter *) x;
TlsSetValue (_Jv_ThreadKey, info->object);
TlsSetValue (_Jv_ThreadDataKey, info->data);
info->method (info->object);
if (! (info->data->flags & FLAG_DAEMON))
{
WaitForSingleObject (daemon_mutex, INFINITE);
non_daemon_count--;
if (! non_daemon_count)
PulseEvent (daemon_cond);
ReleaseMutex (daemon_mutex);
}
return 0;
}
void
_Jv_ThreadStart (java::lang::Thread *thread, _Jv_Thread_t *data, _Jv_ThreadStartFunc *meth)
{
DWORD id;
struct starter *info;
// Do nothing if thread has already started
if (data->flags & FLAG_START)
return;
data->flags |= FLAG_START;
// FIXME: handle marking the info object for GC.
info = (struct starter *) _Jv_AllocBytes (sizeof (struct starter));
info->method = meth;
info->object = thread;
info->data = data;
if (! thread->isDaemon ())
{
WaitForSingleObject (daemon_mutex, INFINITE);
non_daemon_count++;
ReleaseMutex (daemon_mutex);
}
else
data->flags |= FLAG_DAEMON;
HANDLE h = CreateThread(NULL, 0, really_start, info, 0, &id);
_Jv_ThreadSetPriority(data, thread->getPriority());
//if (!h)
//JvThrow ();
}
void
_Jv_ThreadWait (void)
{
WaitForSingleObject(daemon_mutex, INFINITE);
if(non_daemon_count)
SignalObjectAndWait(daemon_mutex, daemon_cond, INFINITE, 0);
ReleaseMutex(daemon_mutex);
}
void
_Jv_ThreadInterrupt (_Jv_Thread_t *data)
{
MessageBox(NULL, "Unimplemented", "win32-threads.cc:_Jv_ThreadInterrupt", MB_OK);
// FIXME:
}