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2003-01-28 Ranjit Mathew <rmathew@hotmail.com> Fixes PR java/9254: * include/win32-threads.h (_Jv_Mutex_t): Convert to a struct additionally containing id of the owner thread as well as the number of nested times the thread has acquired the mutex. (_Jv_MutexInit): Initialise owner thread id and refcount to 0. (_Jv_MutexDestroy): Reset owner thread id and refcount to 0. (_Jv_MutexUnlock): Check if really the owner thread, reset owner thread id to 0 before leaving, if leaving for the last time. (_Jv_MutexLock): Set owner thread id in the mutex and increment refcount. (_Jv_ThreadYield): Yield using a call to Sleep(0). * win32-threads.cc (_Jv_CondWait): Check if really owner of the passed mutex. Pass handle of the broadcast event, instead of a pointer to it in Win32 ResetEvent( ) call. Remove incorrect return values. (_Jv_CondDestroy): Close both event handles and delete critical section. (_Jv_CondNotify): Check if really the owner thread. (_Jv_CondNotifyAll): Check if really the owner thread. (_Jv_InitThreads): Change daemon_cond to a manual-reset event. (really_start): Use SetEvent( ) to signal daemon_cond. (_Jv_ThreadWait): Remove SignalObjectAndWait( ) and use WaitForSingleObject( ) instead to wait for daemon_cond to be signalled. From-SVN: r62033
166 lines
3.6 KiB
C++
166 lines
3.6 KiB
C++
// -*- c++ -*-
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// win32-threads.h - Defines for using Win32 threads.
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/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software
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Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#ifndef __JV_WIN32_THREADS__
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#define __JV_WIN32_THREADS__
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#include <windows.h>
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//
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// Typedefs.
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//
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typedef struct
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{
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// ev[0] (signal) is a Win32 auto-reset event for _Jv_CondNotify
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// ev[1] (broadcast) is a Win32 manual-reset event for _Jv_CondNotifyAll
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HANDLE ev[2];
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// Number of threads waiting on this condition variable
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int blocked_count;
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// Protects access to the blocked_count variable
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CRITICAL_SECTION count_mutex;
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} _Jv_ConditionVariable_t;
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typedef struct
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{
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// The thread-id of the owner thread if any, 0 otherwise
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DWORD owner;
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// Track nested mutex acquisitions by the same thread
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int refcount;
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// The actual Windows construct used to implement this mutex
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CRITICAL_SECTION cs;
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} _Jv_Mutex_t;
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typedef struct
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{
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int flags; // Flags are defined in implementation.
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HANDLE handle; // Actual handle to the thread
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java::lang::Thread *thread_obj;
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} _Jv_Thread_t;
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typedef DWORD _Jv_ThreadId_t;
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inline _Jv_ThreadId_t
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_Jv_ThreadSelf (void)
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{
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return GetCurrentThreadId();
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}
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typedef void _Jv_ThreadStartFunc (java::lang::Thread *);
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//
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// Condition variables.
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//
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int _Jv_CondWait (_Jv_ConditionVariable_t *cv, _Jv_Mutex_t *mu, jlong millis, jint nanos);
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void _Jv_CondInit (_Jv_ConditionVariable_t *cv);
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void _Jv_CondDestroy (_Jv_ConditionVariable_t *cv);
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int _Jv_CondNotify (_Jv_ConditionVariable_t *cv, _Jv_Mutex_t *);
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int _Jv_CondNotifyAll (_Jv_ConditionVariable_t *cv, _Jv_Mutex_t *);
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//
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// Mutexes.
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// We use CRITICAL_SECTIONs instead of CreateMutex() for better performance
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//
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inline void _Jv_MutexInit (_Jv_Mutex_t *mu)
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{
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mu->owner = 0UL;
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mu->refcount = 0;
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InitializeCriticalSection (&(mu->cs));
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}
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#define _Jv_HaveMutexDestroy
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inline void _Jv_MutexDestroy (_Jv_Mutex_t *mu)
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{
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mu->owner = 0UL;
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mu->refcount = 0;
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DeleteCriticalSection (&(mu->cs));
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mu = NULL;
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}
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inline int _Jv_MutexUnlock (_Jv_Mutex_t *mu)
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{
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if (mu->owner == GetCurrentThreadId ( ))
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{
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mu->refcount--;
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if (mu->refcount == 0)
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mu->owner = 0UL;
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LeaveCriticalSection (&(mu->cs));
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return 0;
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}
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else
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return 1;
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}
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inline int _Jv_MutexLock (_Jv_Mutex_t *mu)
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{
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EnterCriticalSection (&(mu->cs));
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mu->owner = GetCurrentThreadId ( );
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mu->refcount++;
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return 0;
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}
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//
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// Thread creation and manipulation.
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//
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void _Jv_InitThreads (void);
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_Jv_Thread_t *_Jv_ThreadInitData (java::lang::Thread *thread);
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void _Jv_ThreadDestroyData (_Jv_Thread_t *data);
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inline java::lang::Thread* _Jv_ThreadCurrent (void)
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{
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extern DWORD _Jv_ThreadKey;
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return (java::lang::Thread *) TlsGetValue(_Jv_ThreadKey);
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}
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inline _Jv_Thread_t *_Jv_ThreadCurrentData(void)
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{
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extern DWORD _Jv_ThreadDataKey;
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return (_Jv_Thread_t *) TlsGetValue(_Jv_ThreadDataKey);
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}
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inline void _Jv_ThreadYield (void)
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{
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Sleep (0);
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}
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void _Jv_ThreadRegister (_Jv_Thread_t *data);
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void _Jv_ThreadUnRegister ();
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void _Jv_ThreadSetPriority (_Jv_Thread_t *data, jint prio);
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void _Jv_ThreadStart (java::lang::Thread *thread, _Jv_Thread_t *data,
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_Jv_ThreadStartFunc *meth);
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void _Jv_ThreadWait (void);
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void _Jv_ThreadInterrupt (_Jv_Thread_t *data);
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// Remove defines from <windows.h> that conflict with various things in libgcj code
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#undef TRUE
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#undef FALSE
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#undef MAX_PRIORITY
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#undef MIN_PRIORITY
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#undef min
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#undef max
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#undef interface
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#undef STRICT
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#undef VOID
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#endif /* __JV_WIN32_THREADS__ */
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