win32-threads.h   [plain text]

// -*- c++ -*-
// win32-threads.h - Defines for using Win32 threads.

/* Copyright (C) 1998, 1999, 2000  Free Software Foundation

   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.  */

#ifndef __JV_WIN32_THREADS__
#define __JV_WIN32_THREADS__

#include <windows.h>

//
// Typedefs.
//

typedef struct _Jv_ConditionVariable_t {
  HANDLE ev[2];
  CRITICAL_SECTION count_mutex;
  int blocked_count;
};

typedef CRITICAL_SECTION _Jv_Mutex_t;

typedef struct
{
  int flags;            // Flags are defined in implementation.
  HANDLE handle;        // Actual handle to the thread
  java::lang::Thread *thread_obj;
} _Jv_Thread_t;

typedef void _Jv_ThreadStartFunc (java::lang::Thread *);

//
// Condition variables.
//

int _Jv_CondWait (_Jv_ConditionVariable_t *cv, _Jv_Mutex_t *mu, jlong millis, jint nanos);
void _Jv_CondInit (_Jv_ConditionVariable_t *cv);
void _Jv_CondDestroy (_Jv_ConditionVariable_t *cv);
int _Jv_CondNotify (_Jv_ConditionVariable_t *cv, _Jv_Mutex_t *);
int _Jv_CondNotifyAll (_Jv_ConditionVariable_t *cv, _Jv_Mutex_t *);

//
// Mutexes.
// We use CRITICAL_SECTIONs instead of CreateMutex() for better performance
//

inline void _Jv_MutexInit (_Jv_Mutex_t *mu)
{
  InitializeCriticalSection(mu);
}

#define _Jv_HaveMutexDestroy
inline void _Jv_MutexDestroy (_Jv_Mutex_t *mu)
{
  DeleteCriticalSection(mu);
  mu = NULL;
}

inline int _Jv_MutexUnlock (_Jv_Mutex_t *mu)
{
  LeaveCriticalSection(mu);
  return 0;
}

inline int _Jv_MutexLock (_Jv_Mutex_t *mu)
{
  EnterCriticalSection(mu);
  return 0;
}

//
// Thread creation and manipulation.
//

void _Jv_InitThreads (void);
_Jv_Thread_t *_Jv_ThreadInitData (java::lang::Thread *thread);
void _Jv_ThreadDestroyData (_Jv_Thread_t *data);

inline java::lang::Thread* _Jv_ThreadCurrent (void)
{
  extern DWORD _Jv_ThreadKey;
  return (java::lang::Thread *) TlsGetValue(_Jv_ThreadKey);
}

inline _Jv_Thread_t *_Jv_ThreadCurrentData(void)
{
  extern DWORD _Jv_ThreadDataKey;
  return (_Jv_Thread_t *) TlsGetValue(_Jv_ThreadDataKey);
}

inline void _Jv_ThreadYield (void)
{
  // FIXME: win98 freezes hard (OS hang) when we use this --
  //        for now, we simply don't yield
  // Sleep (0);
}

void _Jv_ThreadRegister (_Jv_Thread_t *data);
void _Jv_ThreadUnRegister ();

void _Jv_ThreadSetPriority (_Jv_Thread_t *data, jint prio);
void _Jv_ThreadStart (java::lang::Thread *thread, _Jv_Thread_t *data,
		      _Jv_ThreadStartFunc *meth);
void _Jv_ThreadWait (void);
void _Jv_ThreadInterrupt (_Jv_Thread_t *data);

// Remove defines from <windows.h> that conflict with various things in libgcj code

#undef TRUE
#undef FALSE
#undef MAX_PRIORITY
#undef MIN_PRIORITY
#undef min
#undef max
#undef interface
#undef STRICT
#undef VOID

#endif /* __JV_WIN32_THREADS__ */