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/* MSPDebug - debugging tool for MSP430 MCUs
* Copyright (C) 2009-2012 Daniel Beer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef THREAD_H_
#define THREAD_H_
/* Thread start routine signature for all OSes */
typedef void (*thread_func_t)(void *user_data);
#ifdef __Windows__
#include <windows.h>
/* Windows threads. Threads are identified by a HANDLE, which becomes
* signalled when the thread exits.
*
* thread_create() returns 0 on success or -1 if an error occurs.
*/
typedef HANDLE thread_t;
static inline int thread_create(thread_t *t, thread_func_t func, void *arg)
{
*t = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)func, arg,
0, NULL);
return (*t) ? 0 : -1;
}
static inline void thread_join(thread_t t)
{
WaitForSingleObject(t, INFINITE);
}
/* Windows mutexes. We use critical sections, because we don't need to
* share between processes.
*
* None of these functions are expected to fail, although
* InitializeCriticalSection may raise an exception on some versions of
* Windows under low memory conditions.
*/
typedef CRITICAL_SECTION thread_lock_t;
static inline void thread_lock_init(thread_lock_t *lock)
{
InitializeCriticalSection(lock);
}
static inline void thread_lock_destroy(thread_lock_t *lock)
{
DeleteCriticalSection(lock);
}
static inline void thread_lock_acquire(thread_lock_t *lock)
{
EnterCriticalSection(lock);
}
static inline void thread_lock_release(thread_lock_t *lock)
{
LeaveCriticalSection(lock);
}
/* Windows condition variables. These are simulated using kernel event
* objects. Note that this implementation is correct _only_ for the
* case of a single waiter.
*/
typedef HANDLE thread_cond_t;
static inline void thread_cond_init(thread_cond_t *c)
{
*c = CreateEvent(0, TRUE, FALSE, NULL);
}
static inline void thread_cond_destroy(thread_cond_t *c) {
CloseHandle(*c);
}
static inline void thread_cond_wait(thread_cond_t *c, thread_lock_t *m)
{
thread_lock_release(m);
WaitForSingleObject(*c, INFINITE);
thread_lock_acquire(m);
ResetEvent(*c);
}
static inline void thread_cond_notify(thread_cond_t *c)
{
SetEvent(*c);
}
#else /* __Windows__ */
#include <pthread.h>
/* POSIX thread creation. */
typedef pthread_t thread_t;
static inline int thread_create(thread_t *t, thread_func_t func, void *arg)
{
return pthread_create(t, NULL, (void *(*)(void *))func, arg);
}
static inline void thread_join(thread_t t)
{
pthread_join(t, NULL);
}
/* POSIX mutexes. */
typedef pthread_mutex_t thread_lock_t;
static inline void thread_lock_init(thread_lock_t *lock)
{
pthread_mutex_init(lock, NULL);
}
static inline void thread_lock_destroy(thread_lock_t *lock)
{
pthread_mutex_destroy(lock);
}
static inline void thread_lock_acquire(thread_lock_t *lock)
{
pthread_mutex_lock(lock);
}
static inline void thread_lock_release(thread_lock_t *lock)
{
pthread_mutex_unlock(lock);
}
/* POSIX condition variables. */
typedef pthread_cond_t thread_cond_t;
static inline void thread_cond_init(thread_cond_t *c)
{
pthread_cond_init(c, NULL);
}
static inline void thread_cond_destroy(thread_cond_t *c)
{
pthread_cond_destroy(c);
}
static inline void thread_cond_wait(thread_cond_t *c, thread_lock_t *m)
{
pthread_cond_wait(c, m);
}
static inline void thread_cond_notify(thread_cond_t *c)
{
pthread_cond_signal(c);
}
#endif
#endif
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