mingw-w64-libraries/winpthreads/src/mutex.h

/*
   Copyright (c) 2011 mingw-w64 project

   Permission is hereby granted, free of charge, to any person obtaining a
   copy of this software and associated documentation files (the "Software"),
   to deal in the Software without restriction, including without limitation
   the rights to use, copy, modify, merge, publish, distribute, sublicense,
   and/or sell copies of the Software, and to permit persons to whom the
   Software is furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   DEALINGS IN THE SOFTWARE.
*/

#ifndef WIN_PTHREADS_MUTEX_H
#define WIN_PTHREADS_MUTEX_H

#define COND_LOCKED(m)	(m->owner != 0)
#define COND_OWNER(m)	(m->owner == GetCurrentThreadId())
#define COND_DEADLK(m)	COND_OWNER(m)
#define GET_OWNER(m)	(m->owner)
#define GET_HANDLE(m)	(m->h)
#define GET_LOCKCNT(m)	(m->count)
#define GET_RCNT(m)	(m->count) /* not accurate! */
#define SET_OWNER(m)	(m->owner = GetCurrentThreadId())
#define UNSET_OWNER(m)	{ m->owner = 0; }
#define LOCK_UNDO(m)
#define COND_DEADLK_NR(m)	((m->type != PTHREAD_MUTEX_RECURSIVE) && COND_DEADLK(m))
#define CHECK_DEADLK(m)		{ if (COND_DEADLK_NR(m)) return EDEADLK; }

#define STATIC_INITIALIZER(x)		((intptr_t)(x) >= -3 && (intptr_t)(x) <= -1)
#define MUTEX_INITIALIZER2TYPE(x)	((LONGBAG)PTHREAD_NORMAL_MUTEX_INITIALIZER - (LONGBAG)(x))

#define LIFE_MUTEX 0xBAB1F00D
#define DEAD_MUTEX 0xDEADBEEF

typedef struct mutex_t mutex_t;
struct mutex_t
{
    LONG valid;   
    volatile LONG busy;   
    int type;
    volatile LONG count;
    LONG lockOwner;
    DWORD owner;
    HANDLE h;
};

void mutex_print(volatile pthread_mutex_t *m, char *txt);
void mutex_print_set(int state);

#endif