extconf.c

/*  
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2006, Digium, Inc.
 *
 * Steve Murphy <murf@digium.com>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */


/*
 *
 * A condensation of the pbx_config stuff, to read into exensions.conf, and provide an interface to the data there,
 * for operations outside of asterisk. A huge, awful hack.
 *
 */

/*** MODULEINFO
	<support_level>extended</support_level>
 ***/

#include "asterisk.h"

#undef DEBUG_THREADS

#include "asterisk/compat.h"
#include "asterisk/paths.h"	/* we use AST_CONFIG_DIR */

#include <errno.h>
#include <time.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <stdarg.h>
#include <string.h>
#include <locale.h>
#include <ctype.h>
#if !defined(SOLARIS) && !defined(__CYGWIN__)
#include <err.h>
#endif
#include <regex.h>
#include <limits.h>
#include <pthread.h>
#include <netdb.h>
#include <sys/param.h>
#include <signal.h>

static void ast_log(int level, const char *file, int line, const char *function, const char *fmt, ...) __attribute__((format(printf, 5, 6)));
void ast_verbose(const char *fmt, ...) __attribute__((format(printf, 1, 2)));

#define ASINCLUDE_GLOB 1
#ifdef AST_INCLUDE_GLOB

#if !defined(GLOB_ABORTED)
#define GLOB_ABORTED GLOB_ABEND
#endif

# include <glob.h>
#endif

#define AST_API_MODULE  1 /* gimme the inline defs! */
struct ast_channel 
{
	char x; /* basically empty! */
};



#include "asterisk/inline_api.h"
#include "asterisk/endian.h"
#include "asterisk/ast_expr.h"

/* logger.h */

#define EVENTLOG "event_log"
#define	QUEUELOG	"queue_log"

#define DEBUG_M(a) { \
	a; \
}

#define VERBOSE_PREFIX_1 " "
#define VERBOSE_PREFIX_2 "  == "
#define VERBOSE_PREFIX_3 "    -- "
#define VERBOSE_PREFIX_4 "       > "

void ast_backtrace(void);

void ast_queue_log(const char *queuename, const char *callid, const char *agent, const char *event, const char *fmt, ...)
	__attribute__((format(printf, 5, 6)));

/* IN CONFLICT: void ast_verbose(const char *fmt, ...)
   __attribute__((format(printf, 1, 2))); */

int ast_register_verbose(void (*verboser)(const char *string));
int ast_unregister_verbose(void (*verboser)(const char *string));

void ast_console_puts(const char *string);

#define _A_ __FILE__, __LINE__, __PRETTY_FUNCTION__

#ifdef LOG_DEBUG
#undef LOG_DEBUG
#endif
#define __LOG_DEBUG    0
#define LOG_DEBUG      __LOG_DEBUG, _A_

#ifdef LOG_EVENT
#undef LOG_EVENT
#endif
#define __LOG_EVENT    1
#define LOG_EVENT      __LOG_EVENT, _A_

#ifdef LOG_NOTICE
#undef LOG_NOTICE
#endif
#define __LOG_NOTICE   2
#define LOG_NOTICE     __LOG_NOTICE, _A_

#ifdef LOG_WARNING
#undef LOG_WARNING
#endif
#define __LOG_WARNING  3
#define LOG_WARNING    __LOG_WARNING, _A_

#ifdef LOG_ERROR
#undef LOG_ERROR
#endif
#define __LOG_ERROR    4
#define LOG_ERROR      __LOG_ERROR, _A_

#ifdef LOG_VERBOSE
#undef LOG_VERBOSE
#endif
#define __LOG_VERBOSE  5
#define LOG_VERBOSE    __LOG_VERBOSE, _A_

#ifdef LOG_DTMF
#undef LOG_DTMF
#endif
#define __LOG_DTMF  6
#define LOG_DTMF    __LOG_DTMF, _A_

/* lock.h */

#ifndef	HAVE_MTX_PROFILE
#define	__MTX_PROF(a)	return pthread_mutex_lock((a))
#else
int mtx_prof = -1;

#define	__MTX_PROF(a)	do {			\
	int i;					\
	/* profile only non-blocking events */	\
	ast_mark(mtx_prof, 1);			\
	i = pthread_mutex_trylock((a));		\
	ast_mark(mtx_prof, 0);			\
	if (!i)					\
		return i;			\
	else					\
		return pthread_mutex_lock((a)); \
	} while (0)
#endif	/* HAVE_MTX_PROFILE */

#define AST_PTHREADT_NULL (pthread_t) -1
#define AST_PTHREADT_STOP (pthread_t) -2

#if defined(SOLARIS) || defined(BSD)
#define AST_MUTEX_INIT_W_CONSTRUCTORS
#endif /* SOLARIS || BSD */

/* Asterisk REQUIRES recursive (not error checking) mutexes
   and will not run without them. */
#if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP) && defined(PTHREAD_MUTEX_RECURSIVE_NP)
#define PTHREAD_MUTEX_INIT_VALUE	PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
#define AST_MUTEX_KIND			PTHREAD_MUTEX_RECURSIVE_NP
#else
#define PTHREAD_MUTEX_INIT_VALUE	PTHREAD_MUTEX_INITIALIZER
#define AST_MUTEX_KIND			PTHREAD_MUTEX_RECURSIVE
#endif /* PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP */

#ifdef DEBUG_THREADS

#define __ast_mutex_logger(...)  do { if (canlog) ast_log(LOG_ERROR, __VA_ARGS__); else fprintf(stderr, __VA_ARGS__); } while (0)

#ifdef THREAD_CRASH
#define DO_THREAD_CRASH do { *((int *)(0)) = 1; } while(0)
#else
#define DO_THREAD_CRASH do { } while (0)
#endif

#define AST_MUTEX_INIT_VALUE { PTHREAD_MUTEX_INIT_VALUE, { NULL }, { 0 }, 0, { NULL }, { 0 } }

#define AST_MAX_REENTRANCY 10

struct ast_mutex_info {
	pthread_mutex_t mutex;
	/*! Track which thread holds this lock */
	unsigned int track:1;
	const char *file[AST_MAX_REENTRANCY];
	int lineno[AST_MAX_REENTRANCY];
	int reentrancy;
	const char *func[AST_MAX_REENTRANCY];
	pthread_t thread[AST_MAX_REENTRANCY];
};

typedef struct ast_mutex_info ast_mutex_t;

typedef pthread_cond_t ast_cond_t;

static pthread_mutex_t empty_mutex;

static void __attribute__((constructor)) init_empty_mutex(void)
{
	memset(&empty_mutex, 0, sizeof(empty_mutex));
}

static inline int __ast_pthread_mutex_init_attr(const char *filename, int lineno, const char *func,
						const char *mutex_name, ast_mutex_t *t,
						pthread_mutexattr_t *attr) 
{
#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS
	int canlog = strcmp(filename, "logger.c");

	if ((t->mutex) != ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) {
		if ((t->mutex) != (empty_mutex)) {
			__ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is already initialized.\n",
					   filename, lineno, func, mutex_name);
			__ast_mutex_logger("%s line %d (%s): Error: previously initialization of mutex '%s'.\n",
					   t->file[0], t->lineno[0], t->func[0], mutex_name);
			DO_THREAD_CRASH;
			return 0;
		}
	}
#endif

	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()
 */

#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__) || defined(__x86_64__)
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
static int ast_atomic_fetchadd_int_slow(volatile int *p, int v)
{
	int ret;
	ret = *p;
	*p += v;
	return ret;
}
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

/*! \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


#include "asterisk/hashtab.h"
#include "asterisk/ael_structs.h"
#include "asterisk/pval.h"

/* from utils.h */

#define ast_free free
#define ast_free_ptr free

#define MALLOC_FAILURE_MSG \
	ast_log(LOG_ERROR, "Memory Allocation Failure in function %s at line %d of %s\n", func, lineno, file);

/*!
 * \brief A wrapper for malloc()
 *
 * ast_malloc() is a wrapper for malloc() that will generate an Asterisk log
 * message in the case that the allocation fails.
 *
 * The argument and return value are the same as malloc()
 */
#define ast_malloc(len) \
	_ast_malloc((len), __FILE__, __LINE__, __PRETTY_FUNCTION__)

#define ast_calloc(num, len) \
	_ast_calloc((num), (len), __FILE__, __LINE__, __PRETTY_FUNCTION__)

#define ast_calloc_cache(num, len) \
	_ast_calloc((num), (len), __FILE__, __LINE__, __PRETTY_FUNCTION__)

#define ast_realloc(p, len) \
	_ast_realloc((p), (len), __FILE__, __LINE__, __PRETTY_FUNCTION__)

#define ast_strdup(str) \
	_ast_strdup((str), __FILE__, __LINE__, __PRETTY_FUNCTION__)

#define ast_strndup(str, len) \
	_ast_strndup((str), (len), __FILE__, __LINE__, __PRETTY_FUNCTION__)

#define ast_asprintf(ret, fmt, ...) \
	_ast_asprintf((ret), __FILE__, __LINE__, __PRETTY_FUNCTION__, fmt, __VA_ARGS__)

#define ast_vasprintf(ret, fmt, ap) \
	_ast_vasprintf((ret), __FILE__, __LINE__, __PRETTY_FUNCTION__, (fmt), (ap))


static unsigned int __unsigned_int_flags_dummy;

struct ast_flags {  /* stolen from utils.h */
	unsigned int flags;
};
#define ast_test_flag(p,flag) 		({ \
					typeof ((p)->flags) __p = (p)->flags; \
					typeof (__unsigned_int_flags_dummy) __x = 0; \
					(void) (&__p == &__x); \
					((p)->flags & (flag)); \
					})

#define ast_set2_flag(p,value,flag)	do { \
					typeof ((p)->flags) __p = (p)->flags; \
					typeof (__unsigned_int_flags_dummy) __x = 0; \
					(void) (&__p == &__x); \
					if (value) \
						(p)->flags |= (flag); \
					else \
						(p)->flags &= ~(flag); \
					} while (0)



#define MALLOC_FAILURE_MSG \
	ast_log(LOG_ERROR, "Memory Allocation Failure in function %s at line %d of %s\n", func, lineno, file);
/*!
 * \brief A wrapper for malloc()
 *
 * ast_malloc() is a wrapper for malloc() that will generate an Asterisk log
 * message in the case that the allocation fails.
 *
 * The argument and return value are the same as malloc()
 */
#define ast_malloc(len) \
	_ast_malloc((len), __FILE__, __LINE__, __PRETTY_FUNCTION__)

AST_INLINE_API(
void * attribute_malloc _ast_malloc(size_t len, const char *file, int lineno, const char *func),
{
	void *p;

	if (!(p = malloc(len)))
		MALLOC_FAILURE_MSG;

	return p;
}
)

/*!
 * \brief A wrapper for calloc()
 *
 * ast_calloc() is a wrapper for calloc() that will generate an Asterisk log
 * message in the case that the allocation fails.
 *
 * The arguments and return value are the same as calloc()
 */
#define ast_calloc(num, len) \
	_ast_calloc((num), (len), __FILE__, __LINE__, __PRETTY_FUNCTION__)

AST_INLINE_API(
void * attribute_malloc _ast_calloc(size_t num, size_t len, const char *file, int lineno, const char *func),
{