1
0
mirror of https://gitlab.xiph.org/xiph/icecast-common.git synced 2024-06-09 06:10:42 +00:00
icecast-common/thread/thread.c
2018-10-12 11:27:17 +00:00

854 lines
23 KiB
C

/* threads.c: Thread Abstraction Functions
*
* Copyright (C) 2014 Michael Smith <msmith@icecast.org>,
* Brendan Cully <brendan@xiph.org>,
* Karl Heyes <karl@xiph.org>,
* Jack Moffitt <jack@icecast.org>,
* Ed "oddsock" Zaleski <oddsock@xiph.org>,
* Copyright (C) 2012-2018 Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <sys/types.h>
#include <pthread.h>
#ifndef _WIN32
#include <unistd.h>
#include <sys/time.h>
#else
#include <windows.h>
#include <winbase.h>
#endif
#include <signal.h>
#include <thread/thread.h>
#include <avl/avl.h>
#ifdef THREAD_DEBUG
#include <log/log.h>
#endif
#ifdef _WIN32
#define __FUNCTION__ __FILE__
#endif
#ifdef THREAD_DEBUG
#define CATMODULE "thread"
#define LOG_ERROR(y) igloo_log_write(_logid, 1, CATMODULE "/", __FUNCTION__, y)
#define LOG_ERROR3(y, z1, z2, z3) igloo_log_write(_logid, 1, CATMODULE "/", __FUNCTION__, y, z1, z2, z3)
#define LOG_ERROR7(y, z1, z2, z3, z4, z5, z6, z7) igloo_log_write(_logid, 1, CATMODULE "/", __FUNCTION__, y, z1, z2, z3, z4, z5, z6, z7)
#define LOG_WARN(y) igloo_log_write(_logid, 2, CATMODULE "/", __FUNCTION__, y)
#define LOG_WARN3(y, z1, z2, z3) igloo_log_write(_logid, 2, CATMODULE "/", __FUNCTION__, y, z1, z2, z3)
#define LOG_WARN5(y, z1, z2, z3, z4, z5) igloo_log_write(_logid, 2, CATMODULE "/", __FUNCTION__, y, z1, z2, z3, z4, z5)
#define LOG_WARN7(y, z1, z2, z3, z4, z5, z6, z7) igloo_log_write(_logid, 2, CATMODULE "/", __FUNCTION__, y, z1, z2, z3, z4, z5, z6, z7)
#define LOG_INFO(y) igloo_log_write(_logid, 3, CATMODULE "/", __FUNCTION__, y)
#define LOG_INFO4(y, z1, z2, z3, z4) igloo_log_write(_logid, 3, CATMODULE "/", __FUNCTION__, y, z1, z2, z3, z4)
#define LOG_INFO5(y, z1, z2, z3, z4, z5) igloo_log_write(_logid, 3, CATMODULE "/", __FUNCTION__, y, z1, z2, z3, z4, z5)
#define LOG_DEBUG(y) igloo_log_write(_logid, 4, CATMODULE "/", __FUNCTION__, y)
#define LOG_DEBUG2(y, z1, z2) igloo_log_write(_logid, 4, CATMODULE "/", __FUNCTION__, y, z1, z2)
#define LOG_DEBUG5(y, z1, z2, z3, z4, z5) igloo_log_write(_logid, 4, CATMODULE "/", __FUNCTION__, y, z1, z2, z3, z4, z5)
#endif
/* thread starting structure */
typedef struct thread_start_tag {
/* the real start routine and arg */
void *(*start_routine)(void *);
void *arg;
/* the other stuff we need to make sure this thread is inserted into
** the thread tree
*/
igloo_thread_type *thread;
pthread_t sys_thread;
} thread_start_t;
static long igloo__next_thread_id = 0;
static int igloo__initialized = 0;
static igloo_avl_tree *igloo__threadtree = NULL;
#ifdef DEBUG_MUTEXES
static igloo_mutex_t igloo__threadtree_mutex = { -1, NULL, igloo_MUTEX_STATE_UNINIT, NULL, -1,
PTHREAD_MUTEX_INITIALIZER};
#else
static igloo_mutex_t igloo__threadtree_mutex = { PTHREAD_MUTEX_INITIALIZER };
#endif
#ifdef DEBUG_MUTEXES
static int _logid = -1;
static long _next_mutex_id = 0;
static igloo_avl_tree *_mutextree = NULL;
static igloo_mutex_t _mutextree_mutex = { -1, NULL, igloo_MUTEX_STATE_UNINIT, NULL, -1,
PTHREAD_MUTEX_INITIALIZER};
#endif
#ifdef DEBUG_MUTEXES
static igloo_mutex_t igloo__library_mutex = { -1, NULL, igloo_MUTEX_STATE_UNINIT, NULL, -1,
PTHREAD_MUTEX_INITIALIZER};
#else
static igloo_mutex_t igloo__library_mutex = { PTHREAD_MUTEX_INITIALIZER };
#endif
/* INTERNAL FUNCTIONS */
/* avl tree functions */
#ifdef DEBUG_MUTEXES
static int _compare_mutexes(void *compare_arg, void *a, void *b);
static int _free_mutex(void *key);
#endif
static int igloo__compare_threads(void *compare_arg, void *a, void *b);
static int igloo__free_thread(void *key);
/* mutex fuctions */
static void _mutex_create(igloo_mutex_t *mutex);
static void _mutex_lock(igloo_mutex_t *mutex);
static void _mutex_unlock(igloo_mutex_t *mutex);
/* misc thread stuff */
static void *igloo__start_routine(void *arg);
static void _catch_signals(void);
static void _block_signals(void);
/* LIBRARY INITIALIZATION */
void igloo_thread_initialize(void)
{
igloo_thread_type *thread;
/* set up logging */
#ifdef THREAD_DEBUG
igloo_log_initialize();
_logid = igloo_log_open("thread.log");
igloo_log_set_level(_logid, THREAD_DEBUG);
#endif
#ifdef DEBUG_MUTEXES
/* create all the internal mutexes, and initialize the mutex tree */
_mutextree = igloo_avl_tree_new(_compare_mutexes, NULL);
/* we have to create this one by hand, because there's no
** mutextree_mutex to lock yet!
*/
_mutex_create(&_mutextree_mutex);
_mutextree_mutex.mutex_id = _next_mutex_id++;
igloo_avl_insert(_mutextree, (void *)&_mutextree_mutex);
#endif
thread_mutex_create(&igloo__threadtree_mutex);
thread_mutex_create(&igloo__library_mutex);
/* initialize the thread tree and insert the main thread */
igloo__threadtree = igloo_avl_tree_new(igloo__compare_threads, NULL);
thread = (igloo_thread_type *)malloc(sizeof(igloo_thread_type));
thread->thread_id = igloo__next_thread_id++;
thread->line = 0;
thread->file = strdup("main.c");
thread->sys_thread = pthread_self();
thread->create_time = time(NULL);
thread->name = strdup("Main Thread");
igloo_avl_insert(igloo__threadtree, (void *)thread);
_catch_signals();
igloo__initialized = 1;
}
void igloo_thread_shutdown(void)
{
if (igloo__initialized == 1) {
igloo_thread_mutex_destroy(&igloo__library_mutex);
igloo_thread_mutex_destroy(&igloo__threadtree_mutex);
#ifdef THREAD_DEBUG
igloo_thread_mutex_destroy(&_mutextree_mutex);
igloo_avl_tree_free(_mutextree, _free_mutex);
#endif
igloo_avl_tree_free(igloo__threadtree, igloo__free_thread);
igloo__threadtree = NULL;
}
#ifdef THREAD_DEBUG
igloo_log_close(_logid);
igloo_log_shutdown();
#endif
}
/*
* Signals should be handled by the main thread, nowhere else.
* I'm using POSIX signal interface here, until someone tells me
* that I should use signal/sigset instead
*
* This function only valid for non-Win32
*/
static void _block_signals(void)
{
#if !defined(_WIN32) && !defined(__ANDROID__)
sigset_t ss;
sigfillset(&ss);
/* These ones we want */
sigdelset(&ss, SIGKILL);
sigdelset(&ss, SIGSTOP);
sigdelset(&ss, SIGSEGV);
sigdelset(&ss, SIGCHLD);
sigdelset(&ss, SIGBUS);
if (pthread_sigmask(SIG_BLOCK, &ss, NULL) != 0) {
#ifdef THREAD_DEBUG
LOG_ERROR("Pthread_sigmask() failed for blocking signals");
#endif
}
#endif
}
/*
* Let the calling thread catch all the relevant signals
*
* This function only valid for non-Win32
*/
static void _catch_signals(void)
{
#if !defined(_WIN32) && !defined(__ANDROID__)
sigset_t ss;
sigemptyset(&ss);
/* These ones should only be accepted by the signal handling thread (main thread) */
sigaddset(&ss, SIGHUP);
sigaddset(&ss, SIGCHLD);
sigaddset(&ss, SIGINT);
sigaddset(&ss, SIGPIPE);
sigaddset(&ss, SIGTERM);
if (pthread_sigmask(SIG_UNBLOCK, &ss, NULL) != 0) {
#ifdef THREAD_DEBUG
LOG_ERROR("pthread_sigmask() failed for catching signals!");
#endif
}
#endif
}
igloo_thread_type *igloo_thread_create_c(char *name, void *(*start_routine)(void *),
void *arg, int detached, int line, char *file)
{
igloo_thread_type *thread = NULL;
thread_start_t *start = NULL;
pthread_attr_t attr;
thread = (igloo_thread_type *)calloc(1, sizeof(igloo_thread_type));
do {
if (thread == NULL)
break;
start = (thread_start_t *)calloc(1, sizeof(thread_start_t));
if (start == NULL)
break;
if (pthread_attr_init (&attr) < 0)
break;
thread->line = line;
thread->file = strdup(file);
_mutex_lock (&igloo__threadtree_mutex);
thread->thread_id = igloo__next_thread_id++;
_mutex_unlock (&igloo__threadtree_mutex);
thread->name = strdup(name);
thread->create_time = time(NULL);
start->start_routine = start_routine;
start->arg = arg;
start->thread = thread;
pthread_attr_setstacksize (&attr, 512*1024);
#ifndef __ANDROID__
pthread_attr_setinheritsched (&attr, PTHREAD_INHERIT_SCHED);
#endif
if (detached)
{
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
thread->detached = 1;
}
if (pthread_create (&thread->sys_thread, &attr, igloo__start_routine, start) == 0)
{
pthread_attr_destroy (&attr);
return thread;
}
else
pthread_attr_destroy (&attr);
}
while (0);
#ifdef THREAD_DEBUG
LOG_ERROR("Could not create new thread %s", name);
#endif
if (start) free (start);
if (thread) free (thread);
return NULL;
}
/* _mutex_create
**
** creates a mutex
*/
static void _mutex_create(igloo_mutex_t *mutex)
{
#ifdef DEBUG_MUTEXES
mutex->thread_id = igloo_MUTEX_STATE_NEVERLOCKED;
mutex->line = -1;
#endif
pthread_mutex_init(&mutex->sys_mutex, NULL);
}
void igloo_thread_mutex_create_c(igloo_mutex_t *mutex, int line, char *file)
{
_mutex_create(mutex);
#ifdef DEBUG_MUTEXES
_mutex_lock(&_mutextree_mutex);
mutex->mutex_id = _next_mutex_id++;
igloo_avl_insert(_mutextree, (void *)mutex);
_mutex_unlock(&_mutextree_mutex);
#endif
}
void igloo_thread_mutex_destroy (igloo_mutex_t *mutex)
{
pthread_mutex_destroy(&mutex->sys_mutex);
#ifdef DEBUG_MUTEXES
_mutex_lock(&_mutextree_mutex);
igloo_avl_delete(_mutextree, mutex, _free_mutex);
_mutex_unlock(&_mutextree_mutex);
#endif
}
void igloo_thread_mutex_lock_c(igloo_mutex_t *mutex, int line, char *file)
{
#ifdef DEBUG_MUTEXES
igloo_thread_type *th = igloo_thread_self();
if (!th) LOG_WARN("No mt record for %u in lock [%s:%d]", igloo_thread_self(), file, line);
LOG_DEBUG5("Locking %p (%s) on line %d in file %s by thread %d", mutex, mutex->name, line, file, th ? th->thread_id : -1);
# ifdef CHECK_MUTEXES
/* Just a little sanity checking to make sure that we're locking
** mutexes correctly
*/
if (th) {
int locks = 0;
igloo_avl_node *node;
igloo_mutex_t *tmutex;
_mutex_lock(&_mutextree_mutex);
node = igloo_avl_get_first (_mutextree);
while (node) {
tmutex = (igloo_mutex_t *)node->key;
if (tmutex->mutex_id == mutex->mutex_id) {
if (tmutex->thread_id == th->thread_id) {
/* Deadlock, same thread can't lock the same mutex twice */
LOG_ERROR7("DEADLOCK AVOIDED (%d == %d) on mutex [%s] in file %s line %d by thread %d [%s]",
tmutex->thread_id, th->thread_id, mutex->name ? mutex->name : "undefined", file, line, th->thread_id, th->name);
_mutex_unlock(&_mutextree_mutex);
return;
}
} else if (tmutex->thread_id == th->thread_id) {
/* Mutex locked by this thread (not this mutex) */
locks++;
}
node = igloo_avl_get_next(node);
}
if (locks > 0) {
/* Has already got a mutex locked */
if (_multi_mutex.thread_id != th->thread_id) {
/* Tries to lock two mutexes, but has not got the double mutex, norty boy! */
LOG_WARN("(%d != %d) Thread %d [%s] tries to lock a second mutex [%s] in file %s line %d, without locking double mutex!",
_multi_mutex.thread_id, th->thread_id, th->thread_id, th->name, mutex->name ? mutex->name : "undefined", file, line);
}
}
_mutex_unlock(&_mutextree_mutex);
}
# endif /* CHECK_MUTEXES */
_mutex_lock(mutex);
_mutex_lock(&_mutextree_mutex);
LOG_DEBUG2("Locked %p by thread %d", mutex, th ? th->thread_id : -1);
mutex->line = line;
if (th) {
mutex->thread_id = th->thread_id;
}
_mutex_unlock(&_mutextree_mutex);
#else
_mutex_lock(mutex);
#endif /* DEBUG_MUTEXES */
}
void igloo_thread_mutex_unlock_c(igloo_mutex_t *mutex, int line, char *file)
{
#ifdef DEBUG_MUTEXES
igloo_thread_type *th = igloo_thread_self();
if (!th) {
LOG_ERROR3("No record for %u in unlock [%s:%d]", igloo_thread_self(), file, line);
}
LOG_DEBUG5("Unlocking %p (%s) on line %d in file %s by thread %d", mutex, mutex->name, line, file, th ? th->thread_id : -1);
mutex->line = line;
# ifdef CHECK_MUTEXES
if (th) {
int locks = 0;
igloo_avl_node *node;
igloo_mutex_t *tmutex;
_mutex_lock(&_mutextree_mutex);
while (node) {
tmutex = (igloo_mutex_t *)node->key;
if (tmutex->mutex_id == mutex->mutex_id) {
if (tmutex->thread_id != th->thread_id) {
LOG_ERROR7("ILLEGAL UNLOCK (%d != %d) on mutex [%s] in file %s line %d by thread %d [%s]", tmutex->thread_id, th->thread_id,
mutex->name ? mutex->name : "undefined", file, line, th->thread_id, th->name);
_mutex_unlock(&_mutextree_mutex);
return;
}
} else if (tmutex->thread_id == th->thread_id) {
locks++;
}
node = igloo_avl_get_next (node);
}
if ((locks > 0) && (_multi_mutex.thread_id != th->thread_id)) {
/* Don't have double mutex, has more than this mutex left */
LOG_WARN("(%d != %d) Thread %d [%s] tries to unlock a mutex [%s] in file %s line %d, without owning double mutex!",
_multi_mutex.thread_id, th->thread_id, th->thread_id, th->name, mutex->name ? mutex->name : "undefined", file, line);
}
_mutex_unlock(&_mutextree_mutex);
}
# endif /* CHECK_MUTEXES */
_mutex_unlock(mutex);
_mutex_lock(&_mutextree_mutex);
LOG_DEBUG2("Unlocked %p by thread %d", mutex, th ? th->thread_id : -1);
mutex->line = -1;
if (mutex->thread_id == th->thread_id) {
mutex->thread_id = igloo_MUTEX_STATE_NOTLOCKED;
}
_mutex_unlock(&_mutextree_mutex);
#else
_mutex_unlock(mutex);
#endif /* DEBUG_MUTEXES */
}
void igloo_thread_cond_create_c(igloo_cond_t *cond, int line, char *file)
{
pthread_cond_init(&cond->sys_cond, NULL);
pthread_mutex_init(&cond->cond_mutex, NULL);
}
void igloo_thread_cond_destroy(igloo_cond_t *cond)
{
pthread_mutex_destroy(&cond->cond_mutex);
pthread_cond_destroy(&cond->sys_cond);
}
void igloo_thread_cond_signal_c(igloo_cond_t *cond, int line, char *file)
{
pthread_cond_signal(&cond->sys_cond);
}
void igloo_thread_cond_broadcast_c(igloo_cond_t *cond, int line, char *file)
{
pthread_cond_broadcast(&cond->sys_cond);
}
void igloo_thread_cond_timedwait_c(igloo_cond_t *cond, int millis, int line, char *file)
{
struct timespec time;
time.tv_sec = millis/1000;
time.tv_nsec = (millis - time.tv_sec*1000)*1000000;
pthread_mutex_lock(&cond->cond_mutex);
pthread_cond_timedwait(&cond->sys_cond, &cond->cond_mutex, &time);
pthread_mutex_unlock(&cond->cond_mutex);
}
void igloo_thread_cond_wait_c(igloo_cond_t *cond, int line, char *file)
{
pthread_mutex_lock(&cond->cond_mutex);
pthread_cond_wait(&cond->sys_cond, &cond->cond_mutex);
pthread_mutex_unlock(&cond->cond_mutex);
}
void igloo_thread_rwlock_create_c(igloo_rwlock_t *rwlock, int line, char *file)
{
pthread_rwlock_init(&rwlock->sys_rwlock, NULL);
}
void igloo_thread_rwlock_destroy(igloo_rwlock_t *rwlock)
{
pthread_rwlock_destroy(&rwlock->sys_rwlock);
}
void igloo_thread_rwlock_rlock_c(igloo_rwlock_t *rwlock, int line, char *file)
{
pthread_rwlock_rdlock(&rwlock->sys_rwlock);
}
void igloo_thread_rwlock_wlock_c(igloo_rwlock_t *rwlock, int line, char *file)
{
pthread_rwlock_wrlock(&rwlock->sys_rwlock);
}
void igloo_thread_rwlock_unlock_c(igloo_rwlock_t *rwlock, int line, char *file)
{
pthread_rwlock_unlock(&rwlock->sys_rwlock);
}
void igloo_thread_exit_c(long val, int line, char *file)
{
igloo_thread_type *th = igloo_thread_self();
#if defined(DEBUG_MUTEXES) && defined(CHECK_MUTEXES)
if (th) {
igloo_avl_node *node;
igloo_mutex_t *tmutex;
char name[40];
_mutex_lock(&_mutextree_mutex);
while (node) {
tmutex = (igloo_mutex_t *)node->key;
if (tmutex->thread_id == th->thread_id) {
LOG_WARN("Thread %d [%s] exiting in file %s line %d, without unlocking mutex [%s]",
th->thread_id, th->name, file, line, mutex_to_string(tmutex, name));
}
node = igloo_avl_get_next (node);
}
_mutex_unlock(&_mutextree_mutex);
}
#endif
if (th && th->detached)
{
#ifdef THREAD_DEBUG
LOG_INFO4("Removing thread %d [%s] started at [%s:%d], reason: 'Thread Exited'", th->thread_id, th->name, th->file, th->line);
#endif
_mutex_lock(&igloo__threadtree_mutex);
igloo_avl_delete(igloo__threadtree, th, igloo__free_thread);
_mutex_unlock(&igloo__threadtree_mutex);
}
pthread_exit ((void*)val);
}
/* sleep for a number of microseconds */
void igloo_thread_sleep(unsigned long len)
{
#ifdef _WIN32
Sleep(len / 1000);
#else
# ifdef HAVE_NANOSLEEP
struct timespec time_sleep;
struct timespec time_remaining;
int ret;
time_sleep.tv_sec = len / 1000000;
time_sleep.tv_nsec = (len % 1000000) * 1000;
ret = nanosleep(&time_sleep, &time_remaining);
while (ret != 0 && errno == EINTR) {
time_sleep.tv_sec = time_remaining.tv_sec;
time_sleep.tv_nsec = time_remaining.tv_nsec;
ret = nanosleep(&time_sleep, &time_remaining);
}
# else
struct timeval tv;
tv.tv_sec = len / 1000000;
tv.tv_usec = (len % 1000000);
select(0, NULL, NULL, NULL, &tv);
# endif
#endif
}
static void *igloo__start_routine(void *arg)
{
thread_start_t *start = (thread_start_t *)arg;
void *(*start_routine)(void *) = start->start_routine;
void *real_arg = start->arg;
igloo_thread_type *thread = start->thread;
_block_signals();
/* insert thread into thread tree here */
_mutex_lock(&igloo__threadtree_mutex);
thread->sys_thread = pthread_self();
igloo_avl_insert(igloo__threadtree, (void *)thread);
_mutex_unlock(&igloo__threadtree_mutex);
#ifdef THREAD_DEBUG
LOG_INFO4("Added thread %d [%s] started at [%s:%d]", thread->thread_id, thread->name, thread->file, thread->line);
#endif
#ifndef __ANDROID__
pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, NULL);
#endif
free (start);
(start_routine)(real_arg);
if (thread->detached)
{
_mutex_lock (&igloo__threadtree_mutex);
igloo_avl_delete (igloo__threadtree, thread, igloo__free_thread);
_mutex_unlock (&igloo__threadtree_mutex);
}
return NULL;
}
igloo_thread_type *igloo_thread_self(void)
{
igloo_avl_node *node;
igloo_thread_type *th;
pthread_t sys_thread = pthread_self();
_mutex_lock(&igloo__threadtree_mutex);
if (igloo__threadtree == NULL) {
#ifdef THREAD_DEBUG
LOG_WARN("Thread tree is empty, this must be wrong!");
#endif
_mutex_unlock(&igloo__threadtree_mutex);
return NULL;
}
node = igloo_avl_get_first(igloo__threadtree);
while (node) {
th = (igloo_thread_type *)node->key;
if (th && pthread_equal(sys_thread, th->sys_thread)) {
_mutex_unlock(&igloo__threadtree_mutex);
return th;
}
node = igloo_avl_get_next(node);
}
_mutex_unlock(&igloo__threadtree_mutex);
#ifdef THREAD_DEBUG
LOG_ERROR("Nonexistant thread alive...");
#endif
return NULL;
}
void igloo_thread_rename(const char *name)
{
igloo_thread_type *th;
th = igloo_thread_self();
if (th->name) free(th->name);
th->name = strdup(name);
}
static void _mutex_lock(igloo_mutex_t *mutex)
{
pthread_mutex_lock(&mutex->sys_mutex);
}
static void _mutex_unlock(igloo_mutex_t *mutex)
{
pthread_mutex_unlock(&mutex->sys_mutex);
}
void igloo_thread_library_lock(void)
{
_mutex_lock(&igloo__library_mutex);
}
void igloo_thread_library_unlock(void)
{
_mutex_unlock(&igloo__library_mutex);
}
void igloo_thread_join(igloo_thread_type *thread)
{
void *ret;
pthread_join(thread->sys_thread, &ret);
_mutex_lock(&igloo__threadtree_mutex);
igloo_avl_delete(igloo__threadtree, thread, igloo__free_thread);
_mutex_unlock(&igloo__threadtree_mutex);
}
/* AVL tree functions */
#ifdef DEBUG_MUTEXES
static int _compare_mutexes(void *compare_arg, void *a, void *b)
{
igloo_mutex_t *m1, *m2;
m1 = (igloo_mutex_t *)a;
m2 = (igloo_mutex_t *)b;
if (m1->mutex_id > m2->mutex_id)
return 1;
if (m1->mutex_id < m2->mutex_id)
return -1;
return 0;
}
#endif
static int igloo__compare_threads(void *compare_arg, void *a, void *b)
{
igloo_thread_type *t1, *t2;
t1 = (igloo_thread_type *)a;
t2 = (igloo_thread_type *)b;
if (t1->thread_id > t2->thread_id)
return 1;
if (t1->thread_id < t2->thread_id)
return -1;
return 0;
}
#ifdef DEBUG_MUTEXES
static int _free_mutex(void *key)
{
igloo_mutex_t *m;
m = (igloo_mutex_t *)key;
if (m && m->file) {
free(m->file);
m->file = NULL;
}
/* all mutexes are static. don't need to free them */
return 1;
}
#endif
static int igloo__free_thread(void *key)
{
igloo_thread_type *t;
t = (igloo_thread_type *)key;
if (t->file)
free(t->file);
if (t->name)
free(t->name);
free(t);
return 1;
}
#ifdef HAVE_PTHREAD_SPIN_LOCK
void igloo_thread_spin_create (igloo_spin_t *spin)
{
int x = pthread_spin_init (&spin->lock, PTHREAD_PROCESS_PRIVATE);
if (x)
abort();
}
void igloo_thread_spin_destroy (igloo_spin_t *spin)
{
pthread_spin_destroy (&spin->lock);
}
void igloo_thread_spin_lock (igloo_spin_t *spin)
{
int x = pthread_spin_lock (&spin->lock);
if (x != 0)
abort();
}
void igloo_thread_spin_unlock (igloo_spin_t *spin)
{
pthread_spin_unlock (&spin->lock);
}
#endif