bxthread.h

/////////////////////////////////////////////////////////////////////////
// $Id: bxthread.h 13945 2020-09-14 18:43:45Z vruppert $
/////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2017-2020  The Bochs Project
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2 of the License, or (at your option) any later version.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
/////////////////////////////////////////////////////////////////////////

#ifndef BX_THREAD_H
#define BX_THREAD_H

// Bochs multi-threading support

#if defined(WIN32)

#define BX_THREAD_VAR(name) HANDLE name
#define BX_THREAD_FUNC(name,arg) DWORD WINAPI name(LPVOID arg)
#define BX_THREAD_EXIT return 0
#define BX_THREAD_CREATE(name,arg,var) do { var = CreateThread(NULL, 0, name, arg, 0, NULL); } while (0)
#define BX_THREAD_KILL(var) TerminateThread(var, 0)
#define BX_THREAD_JOIN(var)
#define BX_LOCK(mutex) EnterCriticalSection(&(mutex))
#define BX_UNLOCK(mutex) LeaveCriticalSection(&(mutex))
#define BX_MUTEX(mutex) CRITICAL_SECTION mutex
#define BX_INIT_MUTEX(mutex) InitializeCriticalSection(&(mutex))
#define BX_FINI_MUTEX(mutex) DeleteCriticalSection(&(mutex))
#define BX_MSLEEP(val) Sleep(val)

#else

#include <pthread.h>
#include <semaphore.h>


typedef struct
{
	pthread_mutex_t raw;
	pthread_mutexattr_t attr;
} bx_thread_mutex_t;

#define BX_THREAD_VAR(name) pthread_t (name)
#define BX_THREAD_FUNC(name,arg) void name(void* arg)
#define BX_THREAD_EXIT pthread_exit(NULL)
#define BX_THREAD_CREATE(name,arg,var) \
    pthread_create(&(var), NULL, (void *(*)(void *))&(name), arg)
#define BX_THREAD_KILL(var) pthread_cancel(var); pthread_join(var, NULL)
#define BX_THREAD_JOIN(var) pthread_join(var, NULL)
#define BX_LOCK(mutex) pthread_mutex_lock(&(mutex).raw);
#define BX_UNLOCK(mutex) pthread_mutex_unlock(&(mutex).raw);
#define BX_MUTEX(mutex) bx_thread_mutex_t (mutex);
#define BX_INIT_MUTEX(mutex) do { pthread_mutexattr_init(&(mutex).attr); pthread_mutexattr_settype(&(mutex).attr, PTHREAD_MUTEX_RECURSIVE); pthread_mutex_init(&(mutex).raw, &(mutex).attr); } while (0)
#define BX_FINI_MUTEX(mutex) do { pthread_mutex_destroy(&(mutex).raw); pthread_mutexattr_destroy(&(mutex).attr); } while (0)
#define BX_MSLEEP(val) usleep(val*1000)

#endif

typedef struct
{
#if defined(WIN32)
  HANDLE event;
#else
  pthread_cond_t cond;
  pthread_mutex_t lock;
#endif
} bx_thread_event_t;

typedef struct
{
#if defined(WIN32)
  HANDLE sem;
#else
  sem_t sem;
#endif
} bx_thread_sem_t;

void BOCHSAPI_MSVCONLY bx_create_event(bx_thread_event_t *thread_ev);
void BOCHSAPI_MSVCONLY bx_destroy_event(bx_thread_event_t *thread_ev);
void BOCHSAPI_MSVCONLY bx_set_event(bx_thread_event_t *thread_ev);
bx_bool BOCHSAPI_MSVCONLY bx_wait_for_event(bx_thread_event_t *thread_ev);
bool BOCHSAPI_MSVCONLY bx_create_sem(bx_thread_sem_t *thread_sem);
void BOCHSAPI_MSVCONLY bx_destroy_sem(bx_thread_sem_t *thread_sem);
void BOCHSAPI_MSVCONLY bx_wait_sem(bx_thread_sem_t *thread_sem);
void BOCHSAPI_MSVCONLY bx_set_sem(bx_thread_sem_t *thread_sem);

#endif