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    	t->file[0] = filename;
    	t->lineno[0] = lineno;
    	t->func[0] = func;
    	t->thread[0]  = 0;
    	t->reentrancy = 0;
    
    	return pthread_mutex_init(&t->mutex, attr);
    }
    
    static inline int __ast_pthread_mutex_init(const char *filename, int lineno, const char *func,
    					   const char *mutex_name, ast_mutex_t *t)
    {
    	static pthread_mutexattr_t  attr;
    
    	pthread_mutexattr_init(&attr);
    	pthread_mutexattr_settype(&attr, AST_MUTEX_KIND);
    
    	return __ast_pthread_mutex_init_attr(filename, lineno, func, mutex_name, t, &attr);
    }
    #define ast_mutex_init(pmutex) __ast_pthread_mutex_init(__FILE__, __LINE__, __PRETTY_FUNCTION__, #pmutex, pmutex)
    
    static inline int __ast_pthread_mutex_destroy(const char *filename, int lineno, const char *func,
    						const char *mutex_name, ast_mutex_t *t)
    {
    	int res;
    	int canlog = strcmp(filename, "logger.c");
    
    #ifdef AST_MUTEX_INIT_W_CONSTRUCTORS
    	if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
    		__ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n",
    				   filename, lineno, func, mutex_name);
    	}
    #endif
    
    	res = pthread_mutex_trylock(&t->mutex);
    	switch (res) {
    	case 0:
    		pthread_mutex_unlock(&t->mutex);
    		break;
    	case EINVAL:
    		__ast_mutex_logger("%s line %d (%s): Error: attempt to destroy invalid mutex '%s'.\n",
    				  filename, lineno, func, mutex_name);
    		break;
    	case EBUSY:
    		__ast_mutex_logger("%s line %d (%s): Error: attempt to destroy locked mutex '%s'.\n",
    				   filename, lineno, func, mutex_name);
    		__ast_mutex_logger("%s line %d (%s): Error: '%s' was locked here.\n",
    				   t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name);
    		break;
    	}
    
    	if ((res = pthread_mutex_destroy(&t->mutex)))
    		__ast_mutex_logger("%s line %d (%s): Error destroying mutex: %s\n",
    				   filename, lineno, func, strerror(res));
    #ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
    	else
    		t->mutex = PTHREAD_MUTEX_INIT_VALUE;
    #endif
    	t->file[0] = filename;
    	t->lineno[0] = lineno;
    	t->func[0] = func;
    
    	return res;
    }
    
    static inline int __ast_pthread_mutex_lock(const char *filename, int lineno, const char *func,
                                               const char* mutex_name, ast_mutex_t *t)
    {
    	int res;
    	int canlog = strcmp(filename, "logger.c");
    
    #if defined(AST_MUTEX_INIT_W_CONSTRUCTORS)
    	if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
    		__ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n",
    				 filename, lineno, func, mutex_name);
    		ast_mutex_init(t);
    	}
    #endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
    
    #ifdef DETECT_DEADLOCKS
    	{
    		time_t seconds = time(NULL);
    		time_t current;
    		do {
    #ifdef	HAVE_MTX_PROFILE
    			ast_mark(mtx_prof, 1);
    #endif
    			res = pthread_mutex_trylock(&t->mutex);
    #ifdef	HAVE_MTX_PROFILE
    			ast_mark(mtx_prof, 0);
    #endif
    			if (res == EBUSY) {
    				current = time(NULL);
    				if ((current - seconds) && (!((current - seconds) % 5))) {
    					__ast_mutex_logger("%s line %d (%s): Deadlock? waited %d sec for mutex '%s'?\n",
    							   filename, lineno, func, (int)(current - seconds), mutex_name);
    					__ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n",
    							   t->file[t->reentrancy-1], t->lineno[t->reentrancy-1],
    							   t->func[t->reentrancy-1], mutex_name);
    				}
    				usleep(200);
    			}
    		} while (res == EBUSY);
    	}
    #else
    #ifdef	HAVE_MTX_PROFILE
    	ast_mark(mtx_prof, 1);
    	res = pthread_mutex_trylock(&t->mutex);
    	ast_mark(mtx_prof, 0);
    	if (res)
    #endif
    	res = pthread_mutex_lock(&t->mutex);
    #endif /* DETECT_DEADLOCKS */
    
    	if (!res) {
    		if (t->reentrancy < AST_MAX_REENTRANCY) {
    			t->file[t->reentrancy] = filename;
    			t->lineno[t->reentrancy] = lineno;
    			t->func[t->reentrancy] = func;
    			t->thread[t->reentrancy] = pthread_self();
    			t->reentrancy++;
    		} else {
    			__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
    							   filename, lineno, func, mutex_name);
    		}
    	} else {
    		__ast_mutex_logger("%s line %d (%s): Error obtaining mutex: %s\n",
    				   filename, lineno, func, strerror(errno));
    		DO_THREAD_CRASH;
    	}
    
    	return res;
    }
    
    static inline int __ast_pthread_mutex_trylock(const char *filename, int lineno, const char *func,
                                                  const char* mutex_name, ast_mutex_t *t)
    {
    	int res;
    	int canlog = strcmp(filename, "logger.c");
    
    #if defined(AST_MUTEX_INIT_W_CONSTRUCTORS)
    	if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
    		__ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n",
    				   filename, lineno, func, mutex_name);
    		ast_mutex_init(t);
    	}
    #endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
    
    	if (!(res = pthread_mutex_trylock(&t->mutex))) {
    		if (t->reentrancy < AST_MAX_REENTRANCY) {
    			t->file[t->reentrancy] = filename;
    			t->lineno[t->reentrancy] = lineno;
    			t->func[t->reentrancy] = func;
    			t->thread[t->reentrancy] = pthread_self();
    			t->reentrancy++;
    		} else {
    			__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
    					   filename, lineno, func, mutex_name);
    		}
    	} else {
    		__ast_mutex_logger("%s line %d (%s): Warning: '%s' was locked here.\n",
                                       t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name);
    	}
    
    	return res;
    }
    
    static inline int __ast_pthread_mutex_unlock(const char *filename, int lineno, const char *func,
    					     const char *mutex_name, ast_mutex_t *t)
    {
    	int res;
    	int canlog = strcmp(filename, "logger.c");
    
    #ifdef AST_MUTEX_INIT_W_CONSTRUCTORS
    	if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
    		__ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n",
    				   filename, lineno, func, mutex_name);
    	}
    #endif
    
    	if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) {
    		__ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n",
    				   filename, lineno, func, mutex_name);
    		__ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n",
    				   t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name);
    		DO_THREAD_CRASH;
    	}
    
    	if (--t->reentrancy < 0) {
    		__ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n",
    				   filename, lineno, func, mutex_name);
    		t->reentrancy = 0;
    	}
    
    	if (t->reentrancy < AST_MAX_REENTRANCY) {
    		t->file[t->reentrancy] = NULL;
    		t->lineno[t->reentrancy] = 0;
    		t->func[t->reentrancy] = NULL;
    		t->thread[t->reentrancy] = 0;
    	}
    
    	if ((res = pthread_mutex_unlock(&t->mutex))) {
    		__ast_mutex_logger("%s line %d (%s): Error releasing mutex: %s\n", 
    				   filename, lineno, func, strerror(res));
    		DO_THREAD_CRASH;
    	}
    
    	return res;
    }
    
    static inline int __ast_cond_init(const char *filename, int lineno, const char *func,
    				  const char *cond_name, ast_cond_t *cond, pthread_condattr_t *cond_attr)
    {
    	return pthread_cond_init(cond, cond_attr);
    }
    
    static inline int __ast_cond_signal(const char *filename, int lineno, const char *func,
    				    const char *cond_name, ast_cond_t *cond)
    {
    	return pthread_cond_signal(cond);
    }
    
    static inline int __ast_cond_broadcast(const char *filename, int lineno, const char *func,
    				       const char *cond_name, ast_cond_t *cond)
    {
    	return pthread_cond_broadcast(cond);
    }
    
    static inline int __ast_cond_destroy(const char *filename, int lineno, const char *func,
    				     const char *cond_name, ast_cond_t *cond)
    {
    	return pthread_cond_destroy(cond);
    }
    
    static inline int __ast_cond_wait(const char *filename, int lineno, const char *func,
    				  const char *cond_name, const char *mutex_name,
    				  ast_cond_t *cond, ast_mutex_t *t)
    {
    	int res;
    	int canlog = strcmp(filename, "logger.c");
    
    #ifdef AST_MUTEX_INIT_W_CONSTRUCTORS
    	if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
    		__ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n",
    				   filename, lineno, func, mutex_name);
    	}
    #endif
    
    	if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) {
    		__ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n",
    				   filename, lineno, func, mutex_name);
    		__ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n",
    				   t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name);
    		DO_THREAD_CRASH;
    	}
    
    	if (--t->reentrancy < 0) {
    		__ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n",
    				   filename, lineno, func, mutex_name);
    		t->reentrancy = 0;
    	}
    
    	if (t->reentrancy < AST_MAX_REENTRANCY) {
    		t->file[t->reentrancy] = NULL;
    		t->lineno[t->reentrancy] = 0;
    		t->func[t->reentrancy] = NULL;
    		t->thread[t->reentrancy] = 0;
    	}
    
    	if ((res = pthread_cond_wait(cond, &t->mutex))) {
    		__ast_mutex_logger("%s line %d (%s): Error waiting on condition mutex '%s'\n", 
    				   filename, lineno, func, strerror(res));
    		DO_THREAD_CRASH;
    	} else {
    		if (t->reentrancy < AST_MAX_REENTRANCY) {
    			t->file[t->reentrancy] = filename;
    			t->lineno[t->reentrancy] = lineno;
    			t->func[t->reentrancy] = func;
    			t->thread[t->reentrancy] = pthread_self();
    			t->reentrancy++;
    		} else {
    			__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
    							   filename, lineno, func, mutex_name);
    		}
    	}
    
    	return res;
    }
    
    static inline int __ast_cond_timedwait(const char *filename, int lineno, const char *func,
    				       const char *cond_name, const char *mutex_name, ast_cond_t *cond,
    				       ast_mutex_t *t, const struct timespec *abstime)
    {
    	int res;
    	int canlog = strcmp(filename, "logger.c");
    
    #ifdef AST_MUTEX_INIT_W_CONSTRUCTORS
    	if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
    		__ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n",
    				   filename, lineno, func, mutex_name);
    	}
    #endif
    
    	if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) {
    		__ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n",
    				   filename, lineno, func, mutex_name);
    		__ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n",
    				   t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name);
    		DO_THREAD_CRASH;
    	}
    
    	if (--t->reentrancy < 0) {
    		__ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n",
    				   filename, lineno, func, mutex_name);
    		t->reentrancy = 0;
    	}
    
    	if (t->reentrancy < AST_MAX_REENTRANCY) {
    		t->file[t->reentrancy] = NULL;
    		t->lineno[t->reentrancy] = 0;
    		t->func[t->reentrancy] = NULL;
    		t->thread[t->reentrancy] = 0;
    	}
    
    	if ((res = pthread_cond_timedwait(cond, &t->mutex, abstime)) && (res != ETIMEDOUT)) {
    		__ast_mutex_logger("%s line %d (%s): Error waiting on condition mutex '%s'\n", 
    				   filename, lineno, func, strerror(res));
    		DO_THREAD_CRASH;
    	} else {
    		if (t->reentrancy < AST_MAX_REENTRANCY) {
    			t->file[t->reentrancy] = filename;
    			t->lineno[t->reentrancy] = lineno;
    			t->func[t->reentrancy] = func;
    			t->thread[t->reentrancy] = pthread_self();
    			t->reentrancy++;
    		} else {
    			__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
    							   filename, lineno, func, mutex_name);
    		}
    	}
    
    	return res;
    }
    
    #define ast_mutex_destroy(a) __ast_pthread_mutex_destroy(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a)
    #define ast_mutex_lock(a) __ast_pthread_mutex_lock(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a)
    #define ast_mutex_unlock(a) __ast_pthread_mutex_unlock(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a)
    #define ast_mutex_trylock(a) __ast_pthread_mutex_trylock(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a)
    #define ast_cond_init(cond, attr) __ast_cond_init(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond, attr)
    #define ast_cond_destroy(cond) __ast_cond_destroy(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond)
    #define ast_cond_signal(cond) __ast_cond_signal(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond)
    #define ast_cond_broadcast(cond) __ast_cond_broadcast(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond)
    #define ast_cond_wait(cond, mutex) __ast_cond_wait(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, #mutex, cond, mutex)
    #define ast_cond_timedwait(cond, mutex, time) __ast_cond_timedwait(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, #mutex, cond, mutex, time)
    
    #else /* !DEBUG_THREADS */
    
    
    typedef pthread_mutex_t ast_mutex_t;
    
    #define AST_MUTEX_INIT_VALUE	((ast_mutex_t) PTHREAD_MUTEX_INIT_VALUE)
    
    static inline int ast_mutex_init(ast_mutex_t *pmutex)
    {
    	pthread_mutexattr_t attr;
    
    	pthread_mutexattr_init(&attr);
    	pthread_mutexattr_settype(&attr, AST_MUTEX_KIND);
    
    	return pthread_mutex_init(pmutex, &attr);
    }
    
    #define ast_pthread_mutex_init(pmutex,a) pthread_mutex_init(pmutex,a)
    
    static inline int ast_mutex_unlock(ast_mutex_t *pmutex)
    {
    	return pthread_mutex_unlock(pmutex);
    }
    
    static inline int ast_mutex_destroy(ast_mutex_t *pmutex)
    {
    	return pthread_mutex_destroy(pmutex);
    }
    
    static inline int ast_mutex_lock(ast_mutex_t *pmutex)
    {
    	__MTX_PROF(pmutex);
    }
    
    static inline int ast_mutex_trylock(ast_mutex_t *pmutex)
    {
    	return pthread_mutex_trylock(pmutex);
    }
    
    typedef pthread_cond_t ast_cond_t;
    
    static inline int ast_cond_init(ast_cond_t *cond, pthread_condattr_t *cond_attr)
    {
    	return pthread_cond_init(cond, cond_attr);
    }
    
    static inline int ast_cond_signal(ast_cond_t *cond)
    {
    	return pthread_cond_signal(cond);
    }
    
    static inline int ast_cond_broadcast(ast_cond_t *cond)
    {
    	return pthread_cond_broadcast(cond);
    }
    
    static inline int ast_cond_destroy(ast_cond_t *cond)
    {
    	return pthread_cond_destroy(cond);
    }
    
    static inline int ast_cond_wait(ast_cond_t *cond, ast_mutex_t *t)
    {
    	return pthread_cond_wait(cond, t);
    }
    
    static inline int ast_cond_timedwait(ast_cond_t *cond, ast_mutex_t *t, const struct timespec *abstime)
    {
    	return pthread_cond_timedwait(cond, t, abstime);
    }
    
    #endif /* !DEBUG_THREADS */
    
    #if defined(AST_MUTEX_INIT_W_CONSTRUCTORS)
    /* If AST_MUTEX_INIT_W_CONSTRUCTORS is defined, use file scope
     constructors/destructors to create/destroy mutexes.  */
    #define __AST_MUTEX_DEFINE(scope, mutex) \
    	scope ast_mutex_t mutex = AST_MUTEX_INIT_VALUE; \
    static void  __attribute__ ((constructor)) init_##mutex(void) \
    { \
    	ast_mutex_init(&mutex); \
    } \
    static void  __attribute__ ((destructor)) fini_##mutex(void) \
    { \
    	ast_mutex_destroy(&mutex); \
    }
    #else /* !AST_MUTEX_INIT_W_CONSTRUCTORS */
    /* By default, use static initialization of mutexes. */ 
    #define __AST_MUTEX_DEFINE(scope, mutex) \
    	scope ast_mutex_t mutex = AST_MUTEX_INIT_VALUE
    #endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
    
    #define pthread_mutex_t use_ast_mutex_t_instead_of_pthread_mutex_t
    #define pthread_mutex_lock use_ast_mutex_lock_instead_of_pthread_mutex_lock
    #define pthread_mutex_unlock use_ast_mutex_unlock_instead_of_pthread_mutex_unlock
    #define pthread_mutex_trylock use_ast_mutex_trylock_instead_of_pthread_mutex_trylock
    #define pthread_mutex_init use_ast_mutex_init_instead_of_pthread_mutex_init
    #define pthread_mutex_destroy use_ast_mutex_destroy_instead_of_pthread_mutex_destroy
    #define pthread_cond_t use_ast_cond_t_instead_of_pthread_cond_t
    #define pthread_cond_init use_ast_cond_init_instead_of_pthread_cond_init
    #define pthread_cond_destroy use_ast_cond_destroy_instead_of_pthread_cond_destroy
    #define pthread_cond_signal use_ast_cond_signal_instead_of_pthread_cond_signal
    #define pthread_cond_broadcast use_ast_cond_broadcast_instead_of_pthread_cond_broadcast
    #define pthread_cond_wait use_ast_cond_wait_instead_of_pthread_cond_wait
    #define pthread_cond_timedwait use_ast_cond_timedwait_instead_of_pthread_cond_timedwait
    
    #define AST_MUTEX_DEFINE_STATIC(mutex) __AST_MUTEX_DEFINE(static, mutex)
    
    #define AST_MUTEX_INITIALIZER __use_AST_MUTEX_DEFINE_STATIC_rather_than_AST_MUTEX_INITIALIZER__
    
    #define gethostbyname __gethostbyname__is__not__reentrant__use__ast_gethostbyname__instead__
    
    #ifndef __linux__
    #define pthread_create __use_ast_pthread_create_instead__
    #endif
    
    typedef pthread_rwlock_t ast_rwlock_t;
    
    static inline int ast_rwlock_init(ast_rwlock_t *prwlock)
    {
    	pthread_rwlockattr_t attr;
    
    	pthread_rwlockattr_init(&attr);
    
    #ifdef HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NP
    	pthread_rwlockattr_setkind_np(&attr, PTHREAD_RWLOCK_PREFER_WRITER_NP);
    #endif
    
    	return pthread_rwlock_init(prwlock, &attr);
    }
    
    static inline int ast_rwlock_destroy(ast_rwlock_t *prwlock)
    {
    	return pthread_rwlock_destroy(prwlock);
    }
    
    static inline int ast_rwlock_unlock(ast_rwlock_t *prwlock)
    {
    	return pthread_rwlock_unlock(prwlock);
    }
    
    static inline int ast_rwlock_rdlock(ast_rwlock_t *prwlock)
    {
    	return pthread_rwlock_rdlock(prwlock);
    }
    
    static inline int ast_rwlock_tryrdlock(ast_rwlock_t *prwlock)
    {
    	return pthread_rwlock_tryrdlock(prwlock);
    }
    
    static inline int ast_rwlock_wrlock(ast_rwlock_t *prwlock)
    {
    	return pthread_rwlock_wrlock(prwlock);
    }
    
    static inline int ast_rwlock_trywrlock(ast_rwlock_t *prwlock)
    {
    	return pthread_rwlock_trywrlock(prwlock);
    }
    
    /* Statically declared read/write locks */
    
    #ifndef HAVE_PTHREAD_RWLOCK_INITIALIZER
    #define __AST_RWLOCK_DEFINE(scope, rwlock) \
            scope ast_rwlock_t rwlock; \
    static void  __attribute__ ((constructor)) init_##rwlock(void) \
    { \
            ast_rwlock_init(&rwlock); \
    } \
    static void  __attribute__ ((destructor)) fini_##rwlock(void) \
    { \
            ast_rwlock_destroy(&rwlock); \
    }
    #else
    #define AST_RWLOCK_INIT_VALUE PTHREAD_RWLOCK_INITIALIZER
    #define __AST_RWLOCK_DEFINE(scope, rwlock) \
            scope ast_rwlock_t rwlock = AST_RWLOCK_INIT_VALUE
    #endif
    
    #define AST_RWLOCK_DEFINE_STATIC(rwlock) __AST_RWLOCK_DEFINE(static, rwlock)
    
    /*
     * Initial support for atomic instructions.
     * For platforms that have it, use the native cpu instruction to
     * implement them. For other platforms, resort to a 'slow' version
     * (defined in utils.c) that protects the atomic instruction with
     * a single lock.
     * The slow versions is always available, for testing purposes,
     * as ast_atomic_fetchadd_int_slow()
     */
    
    int ast_atomic_fetchadd_int_slow(volatile int *p, int v);
    
    #if defined(HAVE_OSX_ATOMICS)
    #include "libkern/OSAtomic.h"
    #endif
    
    /*! \brief Atomically add v to *p and return * the previous value of *p.
     * This can be used to handle reference counts, and the return value
     * can be used to generate unique identifiers.
     */
    
    #if defined(HAVE_GCC_ATOMICS)
    AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v),
    {
    	return __sync_fetch_and_add(p, v);
    })
    #elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 4)
    AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v),
    {
    	return OSAtomicAdd32(v, (int32_t *) p);
    })
    #elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 8)
    AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v),
    {
    	return OSAtomicAdd64(v, (int64_t *) p);
    #elif defined (__i386__)
    AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v),
    {
    	__asm __volatile (
    	"       lock   xaddl   %0, %1 ;        "
    	: "+r" (v),                     /* 0 (result) */   
    	  "=m" (*p)                     /* 1 */
    	: "m" (*p));                    /* 2 */
    	return (v);
    })
    #else   /* low performance version in utils.c */
    AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v),
    {
    	return ast_atomic_fetchadd_int_slow(p, v);
    })
    #endif
    
    /*! \brief decrement *p by 1 and return true if the variable has reached 0.
     * Useful e.g. to check if a refcount has reached 0.
     */
    #if defined(HAVE_GCC_ATOMICS)
    AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p),
    {
    	return __sync_sub_and_fetch(p, 1) == 0;
    })
    #elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 4)
    AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p),
    {
    	return OSAtomicAdd32( -1, (int32_t *) p) == 0;
    })
    #elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 8)
    AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p),
    {
    	return OSAtomicAdd64( -1, (int64_t *) p) == 0;
    #else
    AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p),
    {
    	int a = ast_atomic_fetchadd_int(p, -1);
    	return a == 1; /* true if the value is 0 now (so it was 1 previously) */
    })
    #endif
    
    #ifndef DEBUG_CHANNEL_LOCKS
    /*! \brief Lock a channel. If DEBUG_CHANNEL_LOCKS is defined 
    	in the Makefile, print relevant output for debugging */
    #define ast_channel_lock(x)		ast_mutex_lock(&x->lock)
    /*! \brief Unlock a channel. If DEBUG_CHANNEL_LOCKS is defined 
    	in the Makefile, print relevant output for debugging */
    #define ast_channel_unlock(x)		ast_mutex_unlock(&x->lock)
    /*! \brief Try locking a channel. If DEBUG_CHANNEL_LOCKS is defined 
    	in the Makefile, print relevant output for debugging */
    #define ast_channel_trylock(x)		ast_mutex_trylock(&x->lock)
    #else
    
    struct ast_channel;
    
    /*! \brief Lock AST channel (and print debugging output)
    \note You need to enable DEBUG_CHANNEL_LOCKS for this function */
    int ast_channel_lock(struct ast_channel *chan);
    
    /*! \brief Unlock AST channel (and print debugging output)
    \note You need to enable DEBUG_CHANNEL_LOCKS for this function
    */
    int ast_channel_unlock(struct ast_channel *chan);
    
    /*! \brief Lock AST channel (and print debugging output)
    \note   You need to enable DEBUG_CHANNEL_LOCKS for this function */
    int ast_channel_trylock(struct ast_channel *chan);
    #endif
    
    
    /* linkedlists.h */
    
    #define AST_LIST_LOCK(head)						\
    	ast_mutex_lock(&(head)->lock) 
    
    /*!
      \brief Write locks a list.
      \param head This is a pointer to the list head structure
    
      This macro attempts to place an exclusive write lock in the
      list head structure pointed to by head.
      Returns non-zero on success, 0 on failure
    */
    #define AST_RWLIST_WRLOCK(head)                                         \
            ast_rwlock_wrlock(&(head)->lock)
    
    /*!
      \brief Read locks a list.
      \param head This is a pointer to the list head structure
    
      This macro attempts to place a read lock in the
      list head structure pointed to by head.
      Returns non-zero on success, 0 on failure
    */
    #define AST_RWLIST_RDLOCK(head)                                         \
            ast_rwlock_rdlock(&(head)->lock)
    	
    /*!
      \brief Locks a list, without blocking if the list is locked.
      \param head This is a pointer to the list head structure
    
      This macro attempts to place an exclusive lock in the
      list head structure pointed to by head.
      Returns non-zero on success, 0 on failure
    */
    #define AST_LIST_TRYLOCK(head)						\
    	ast_mutex_trylock(&(head)->lock) 
    
    /*!
      \brief Write locks a list, without blocking if the list is locked.
      \param head This is a pointer to the list head structure
    
      This macro attempts to place an exclusive write lock in the
      list head structure pointed to by head.
      Returns non-zero on success, 0 on failure
    */
    #define AST_RWLIST_TRYWRLOCK(head)                                      \
            ast_rwlock_trywrlock(&(head)->lock)
    
    /*!
      \brief Read locks a list, without blocking if the list is locked.
      \param head This is a pointer to the list head structure
    
      This macro attempts to place a read lock in the
      list head structure pointed to by head.
      Returns non-zero on success, 0 on failure
    */
    #define AST_RWLIST_TRYRDLOCK(head)                                      \
            ast_rwlock_tryrdlock(&(head)->lock)
    	
    /*!
      \brief Attempts to unlock a list.
      \param head This is a pointer to the list head structure
    
      This macro attempts to remove an exclusive lock from the
      list head structure pointed to by head. If the list
      was not locked by this thread, this macro has no effect.
    */
    #define AST_LIST_UNLOCK(head) 						\
    	ast_mutex_unlock(&(head)->lock)
    
    /*!
      \brief Attempts to unlock a read/write based list.
      \param head This is a pointer to the list head structure
    
      This macro attempts to remove a read or write lock from the
      list head structure pointed to by head. If the list
      was not locked by this thread, this macro has no effect.
    */
    #define AST_RWLIST_UNLOCK(head)                                         \
            ast_rwlock_unlock(&(head)->lock)
    
    /*!
      \brief Defines a structure to be used to hold a list of specified type.
      \param name This will be the name of the defined structure.
      \param type This is the type of each list entry.
    
      This macro creates a structure definition that can be used
      to hold a list of the entries of type \a type. It does not actually
      declare (allocate) a structure; to do that, either follow this
      macro with the desired name of the instance you wish to declare,
      or use the specified \a name to declare instances elsewhere.
    
      Example usage:
      \code
      static AST_LIST_HEAD(entry_list, entry) entries;
      \endcode
    
      This would define \c struct \c entry_list, and declare an instance of it named
      \a entries, all intended to hold a list of type \c struct \c entry.
    */
    #define AST_LIST_HEAD(name, type)					\
    struct name {								\
    	struct type *first;						\
    	struct type *last;						\
    	ast_mutex_t lock;						\
    }
    
    /*!
      \brief Defines a structure to be used to hold a read/write list of specified type.
      \param name This will be the name of the defined structure.
      \param type This is the type of each list entry.
    
      This macro creates a structure definition that can be used
      to hold a list of the entries of type \a type. It does not actually
      declare (allocate) a structure; to do that, either follow this
      macro with the desired name of the instance you wish to declare,
      or use the specified \a name to declare instances elsewhere.
    
      Example usage:
      \code
      static AST_RWLIST_HEAD(entry_list, entry) entries;
      \endcode
    
      This would define \c struct \c entry_list, and declare an instance of it named
      \a entries, all intended to hold a list of type \c struct \c entry.
    */
    #define AST_RWLIST_HEAD(name, type)                                     \
    struct name {                                                           \
            struct type *first;                                             \
            struct type *last;                                              \
            ast_rwlock_t lock;                                              \
    }
    
    /*!
      \brief Defines a structure to be used to hold a list of specified type (with no lock).
      \param name This will be the name of the defined structure.
      \param type This is the type of each list entry.
    
      This macro creates a structure definition that can be used
      to hold a list of the entries of type \a type. It does not actually
      declare (allocate) a structure; to do that, either follow this
      macro with the desired name of the instance you wish to declare,
      or use the specified \a name to declare instances elsewhere.
    
      Example usage:
      \code
      static AST_LIST_HEAD_NOLOCK(entry_list, entry) entries;
      \endcode
    
      This would define \c struct \c entry_list, and declare an instance of it named
      \a entries, all intended to hold a list of type \c struct \c entry.
    */
    #define AST_LIST_HEAD_NOLOCK(name, type)				\
    struct name {								\
    	struct type *first;						\
    	struct type *last;						\
    }
    
    /*!
      \brief Defines initial values for a declaration of AST_LIST_HEAD
    */
    #define AST_LIST_HEAD_INIT_VALUE	{		\
    	.first = NULL,					\
    	.last = NULL,					\
    	.lock = AST_MUTEX_INIT_VALUE,			\
    	}
    
    /*!
      \brief Defines initial values for a declaration of AST_RWLIST_HEAD
    */
    #define AST_RWLIST_HEAD_INIT_VALUE      {               \
            .first = NULL,                                  \
            .last = NULL,                                   \
            .lock = AST_RWLOCK_INIT_VALUE,                  \
            }
    
    /*!
      \brief Defines initial values for a declaration of AST_LIST_HEAD_NOLOCK
    */
    #define AST_LIST_HEAD_NOLOCK_INIT_VALUE	{	\
    	.first = NULL,					\
    	.last = NULL,					\
    	}
    
    /*!
      \brief Defines a structure to be used to hold a list of specified type, statically initialized.
      \param name This will be the name of the defined structure.
      \param type This is the type of each list entry.
    
      This macro creates a structure definition that can be used
      to hold a list of the entries of type \a type, and allocates an instance
      of it, initialized to be empty.
    
      Example usage:
      \code
      static AST_LIST_HEAD_STATIC(entry_list, entry);
      \endcode
    
      This would define \c struct \c entry_list, intended to hold a list of
      type \c struct \c entry.
    */
    #if defined(AST_MUTEX_INIT_W_CONSTRUCTORS)
    #define AST_LIST_HEAD_STATIC(name, type)				\
    struct name {								\
    	struct type *first;						\
    	struct type *last;						\
    	ast_mutex_t lock;						\
    } name;									\
    static void  __attribute__ ((constructor)) init_##name(void)		\
    {									\
            AST_LIST_HEAD_INIT(&name);					\
    }									\
    static void  __attribute__ ((destructor)) fini_##name(void)		\
    {									\
            AST_LIST_HEAD_DESTROY(&name);					\
    }									\
    struct __dummy_##name
    #else
    #define AST_LIST_HEAD_STATIC(name, type)				\
    struct name {								\
    	struct type *first;						\
    	struct type *last;						\
    	ast_mutex_t lock;						\
    } name = AST_LIST_HEAD_INIT_VALUE
    #endif
    
    /*!
      \brief Defines a structure to be used to hold a read/write list of specified type, statically initialized.
      \param name This will be the name of the defined structure.
      \param type This is the type of each list entry.
    
      This macro creates a structure definition that can be used
      to hold a list of the entries of type \a type, and allocates an instance
      of it, initialized to be empty.
    
      Example usage:
      \code
      static AST_RWLIST_HEAD_STATIC(entry_list, entry);
      \endcode
    
      This would define \c struct \c entry_list, intended to hold a list of
      type \c struct \c entry.
    */
    #ifndef AST_RWLOCK_INIT_VALUE
    #define AST_RWLIST_HEAD_STATIC(name, type)                              \
    struct name {                                                           \
            struct type *first;                                             \
            struct type *last;                                              \
            ast_rwlock_t lock;                                              \
    } name;                                                                 \
    static void  __attribute__ ((constructor)) init_##name(void)            \
    {                                                                       \
            AST_RWLIST_HEAD_INIT(&name);                                    \
    }                                                                       \
    static void  __attribute__ ((destructor)) fini_##name(void)             \
    {                                                                       \
            AST_RWLIST_HEAD_DESTROY(&name);                                 \
    }                                                                       \
    struct __dummy_##name
    #else
    #define AST_RWLIST_HEAD_STATIC(name, type)                              \
    struct name {                                                           \
            struct type *first;                                             \
            struct type *last;                                              \
            ast_rwlock_t lock;                                              \
    } name = AST_RWLIST_HEAD_INIT_VALUE
    #endif
    
    /*!
      \brief Defines a structure to be used to hold a list of specified type, statically initialized.
    
      This is the same as AST_LIST_HEAD_STATIC, except without the lock included.
    */
    #define AST_LIST_HEAD_NOLOCK_STATIC(name, type)				\
    struct name {								\
    	struct type *first;						\
    	struct type *last;						\
    } name = AST_LIST_HEAD_NOLOCK_INIT_VALUE
    
    /*!
      \brief Initializes a list head structure with a specified first entry.
      \param head This is a pointer to the list head structure
      \param entry pointer to the list entry that will become the head of the list
    
      This macro initializes a list head structure by setting the head
      entry to the supplied value and recreating the embedded lock.
    */
    #define AST_LIST_HEAD_SET(head, entry) do {				\
    	(head)->first = (entry);					\
    	(head)->last = (entry);						\
    	ast_mutex_init(&(head)->lock);					\
    } while (0)
    
    /*!
      \brief Initializes an rwlist head structure with a specified first entry.
      \param head This is a pointer to the list head structure
      \param entry pointer to the list entry that will become the head of the list
    
      This macro initializes a list head structure by setting the head
      entry to the supplied value and recreating the embedded lock.
    */
    #define AST_RWLIST_HEAD_SET(head, entry) do {                           \
            (head)->first = (entry);                                        \
            (head)->last = (entry);                                         \
            ast_rwlock_init(&(head)->lock);                                 \
    } while (0)
    
    /*!
      \brief Initializes a list head structure with a specified first entry.
      \param head This is a pointer to the list head structure
      \param entry pointer to the list entry that will become the head of the list
    
      This macro initializes a list head structure by setting the head
      entry to the supplied value.
    */
    #define AST_LIST_HEAD_SET_NOLOCK(head, entry) do {			\
    	(head)->first = (entry);					\
    	(head)->last = (entry);						\
    } while (0)
    
    /*!
      \brief Declare a forward link structure inside a list entry.
      \param type This is the type of each list entry.
    
      This macro declares a structure to be used to link list entries together.
      It must be used inside the definition of the structure named in
      \a type, as follows:
    
      \code
      struct list_entry {
      	...
      	AST_LIST_ENTRY(list_entry) list;
      }
      \endcode
    
      The field name \a list here is arbitrary, and can be anything you wish.
    */
    #define AST_LIST_ENTRY(type)						\
    struct {								\
    	struct type *next;						\
    }
    
    #define AST_RWLIST_ENTRY AST_LIST_ENTRY
     
    /*!
      \brief Returns the first entry contained in a list.
      \param head This is a pointer to the list head structure
     */
    #define	AST_LIST_FIRST(head)	((head)->first)
    
    #define AST_RWLIST_FIRST AST_LIST_FIRST
    
    /*!
      \brief Returns the last entry contained in a list.
      \param head This is a pointer to the list head structure
     */