mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-11-27 13:32:45 +00:00
Set wakeup time in pthread_cond_wait() to `forever' (-1) to prevent
calling thread from being rescheduled based on an unspecified wakeup time. Bug/fix pointed out by Alexandre Fenyo <fenyo@email.enst.fr>.
This commit is contained in:
John Birrell
parent
2dc545bba5
commit
8253a7d685
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=24827
@ -48,8 +48,8 @@ pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * cond_attr)
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rval = -1;
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} else {
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/*
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* Check if a pointer to a condition variable attribute structure was
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* passed by the caller:
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* Check if a pointer to a condition variable attribute
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* structure was passed by the caller:
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*/
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if (cond_attr != NULL && *cond_attr != NULL) {
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/* Default to a fast condition variable: */
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@ -61,12 +61,12 @@ pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * cond_attr)
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/* Process according to condition variable type: */
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switch (type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
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case COND_TYPE_FAST:
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/* Nothing to do here. */
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -76,7 +76,8 @@ pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * cond_attr)
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/* Check for no errors: */
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if (rval == 0) {
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if ((pcond = (pthread_cond_t) malloc(sizeof(struct pthread_cond))) == NULL) {
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if ((pcond = (pthread_cond_t)
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malloc(sizeof(struct pthread_cond))) == NULL) {
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errno = ENOMEM;
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rval = -1;
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} else {
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@ -106,12 +107,12 @@ pthread_cond_destroy(pthread_cond_t * cond)
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} else {
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/* Process according to condition variable type: */
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switch ((*cond)->c_type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
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case COND_TYPE_FAST:
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/* Nothing to do here. */
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -147,16 +148,23 @@ pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t * mutex)
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/* Process according to condition variable type: */
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switch ((*cond)->c_type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
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case COND_TYPE_FAST:
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/* Queue the running thread for the condition variable: */
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_thread_queue_enq(&(*cond)->c_queue, _thread_run);
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/*
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* Queue the running thread for the condition
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* variable:
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*/
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_thread_queue_enq(&(*cond)->c_queue, _thread_run);
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/* Unlock the mutex: */
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pthread_mutex_unlock(mutex);
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/* Wait forever: */
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_thread_run->wakeup_time.tv_sec = -1;
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/* Schedule the next thread: */
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_thread_kern_sched_state(PS_COND_WAIT, __FILE__, __LINE__);
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_thread_kern_sched_state(PS_COND_WAIT,
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__FILE__, __LINE__);
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/* Block signals: */
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_thread_kern_sig_block(NULL);
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@ -165,7 +173,7 @@ pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t * mutex)
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rval = pthread_mutex_lock(mutex);
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -197,7 +205,7 @@ pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex,
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/* Process according to condition variable type: */
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switch ((*cond)->c_type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
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case COND_TYPE_FAST:
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/* Set the wakeup time: */
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_thread_run->wakeup_time.tv_sec = abstime->tv_sec;
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@ -206,19 +214,24 @@ pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex,
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/* Reset the timeout flag: */
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_thread_run->timeout = 0;
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/* Queue the running thread for the condition variable: */
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/*
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* Queue the running thread for the condition
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* variable:
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*/
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_thread_queue_enq(&(*cond)->c_queue, _thread_run);
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/* Unlock the mutex: */
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if ((rval = pthread_mutex_unlock(mutex)) != 0) {
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/*
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* Cannot unlock the mutex, so remove the running
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* thread from the condition variable queue:
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* Cannot unlock the mutex, so remove the
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* running thread from the condition
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* variable queue:
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*/
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_thread_queue_deq(&(*cond)->c_queue);
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} else {
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/* Schedule the next thread: */
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_thread_kern_sched_state(PS_COND_WAIT, __FILE__, __LINE__);
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_thread_kern_sched_state(PS_COND_WAIT,
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__FILE__, __LINE__);
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/* Block signals: */
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_thread_kern_sig_block(NULL);
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@ -235,7 +248,7 @@ pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex,
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}
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -267,7 +280,7 @@ pthread_cond_signal(pthread_cond_t * cond)
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/* Process according to condition variable type: */
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switch ((*cond)->c_type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
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case COND_TYPE_FAST:
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/* Bring the next thread off the condition queue: */
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if ((pthread = _thread_queue_deq(&(*cond)->c_queue)) != NULL) {
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@ -276,7 +289,7 @@ pthread_cond_signal(pthread_cond_t * cond)
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}
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -304,16 +317,20 @@ pthread_cond_broadcast(pthread_cond_t * cond)
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/* Process according to condition variable type: */
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switch ((*cond)->c_type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
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case COND_TYPE_FAST:
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/* Enter a loop to bring all threads off the condition queue: */
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while ((pthread = _thread_queue_deq(&(*cond)->c_queue)) != NULL) {
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/*
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* Enter a loop to bring all threads off the
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* condition queue:
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*/
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while ((pthread =
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_thread_queue_deq(&(*cond)->c_queue)) != NULL) {
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/* Allow the thread to run: */
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PTHREAD_NEW_STATE(pthread,PS_RUNNING);
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}
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -48,8 +48,8 @@ pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * cond_attr)
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rval = -1;
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} else {
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/*
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* Check if a pointer to a condition variable attribute structure was
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* passed by the caller:
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* Check if a pointer to a condition variable attribute
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* structure was passed by the caller:
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*/
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if (cond_attr != NULL && *cond_attr != NULL) {
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/* Default to a fast condition variable: */
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@ -61,12 +61,12 @@ pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * cond_attr)
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/* Process according to condition variable type: */
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switch (type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
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case COND_TYPE_FAST:
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/* Nothing to do here. */
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -76,7 +76,8 @@ pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * cond_attr)
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/* Check for no errors: */
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if (rval == 0) {
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if ((pcond = (pthread_cond_t) malloc(sizeof(struct pthread_cond))) == NULL) {
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if ((pcond = (pthread_cond_t)
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malloc(sizeof(struct pthread_cond))) == NULL) {
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errno = ENOMEM;
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rval = -1;
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} else {
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@ -106,12 +107,12 @@ pthread_cond_destroy(pthread_cond_t * cond)
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} else {
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/* Process according to condition variable type: */
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switch ((*cond)->c_type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
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case COND_TYPE_FAST:
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/* Nothing to do here. */
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -147,16 +148,23 @@ pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t * mutex)
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/* Process according to condition variable type: */
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switch ((*cond)->c_type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
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case COND_TYPE_FAST:
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/* Queue the running thread for the condition variable: */
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_thread_queue_enq(&(*cond)->c_queue, _thread_run);
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/*
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* Queue the running thread for the condition
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* variable:
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*/
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_thread_queue_enq(&(*cond)->c_queue, _thread_run);
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/* Unlock the mutex: */
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pthread_mutex_unlock(mutex);
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/* Wait forever: */
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_thread_run->wakeup_time.tv_sec = -1;
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/* Schedule the next thread: */
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_thread_kern_sched_state(PS_COND_WAIT, __FILE__, __LINE__);
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_thread_kern_sched_state(PS_COND_WAIT,
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__FILE__, __LINE__);
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/* Block signals: */
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_thread_kern_sig_block(NULL);
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@ -165,7 +173,7 @@ pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t * mutex)
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rval = pthread_mutex_lock(mutex);
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -197,7 +205,7 @@ pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex,
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/* Process according to condition variable type: */
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switch ((*cond)->c_type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
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case COND_TYPE_FAST:
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/* Set the wakeup time: */
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_thread_run->wakeup_time.tv_sec = abstime->tv_sec;
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@ -206,19 +214,24 @@ pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex,
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/* Reset the timeout flag: */
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_thread_run->timeout = 0;
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/* Queue the running thread for the condition variable: */
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/*
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* Queue the running thread for the condition
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* variable:
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*/
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_thread_queue_enq(&(*cond)->c_queue, _thread_run);
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/* Unlock the mutex: */
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if ((rval = pthread_mutex_unlock(mutex)) != 0) {
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/*
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* Cannot unlock the mutex, so remove the running
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* thread from the condition variable queue:
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* Cannot unlock the mutex, so remove the
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* running thread from the condition
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* variable queue:
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*/
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_thread_queue_deq(&(*cond)->c_queue);
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} else {
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/* Schedule the next thread: */
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_thread_kern_sched_state(PS_COND_WAIT, __FILE__, __LINE__);
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_thread_kern_sched_state(PS_COND_WAIT,
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__FILE__, __LINE__);
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/* Block signals: */
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_thread_kern_sig_block(NULL);
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@ -235,7 +248,7 @@ pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex,
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}
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -267,7 +280,7 @@ pthread_cond_signal(pthread_cond_t * cond)
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/* Process according to condition variable type: */
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switch ((*cond)->c_type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
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case COND_TYPE_FAST:
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/* Bring the next thread off the condition queue: */
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if ((pthread = _thread_queue_deq(&(*cond)->c_queue)) != NULL) {
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@ -276,7 +289,7 @@ pthread_cond_signal(pthread_cond_t * cond)
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}
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -304,16 +317,20 @@ pthread_cond_broadcast(pthread_cond_t * cond)
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/* Process according to condition variable type: */
|
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switch ((*cond)->c_type) {
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/* Fast condition variable: */
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/* Fast condition variable: */
|
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case COND_TYPE_FAST:
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/* Enter a loop to bring all threads off the condition queue: */
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while ((pthread = _thread_queue_deq(&(*cond)->c_queue)) != NULL) {
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/*
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* Enter a loop to bring all threads off the
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* condition queue:
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*/
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while ((pthread =
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_thread_queue_deq(&(*cond)->c_queue)) != NULL) {
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/* Allow the thread to run: */
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PTHREAD_NEW_STATE(pthread,PS_RUNNING);
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}
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break;
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/* Trap invalid condition variable types: */
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/* Trap invalid condition variable types: */
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -48,8 +48,8 @@ pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * cond_attr)
|
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rval = -1;
|
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} else {
|
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/*
|
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* Check if a pointer to a condition variable attribute structure was
|
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* passed by the caller:
|
||||
* Check if a pointer to a condition variable attribute
|
||||
* structure was passed by the caller:
|
||||
*/
|
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if (cond_attr != NULL && *cond_attr != NULL) {
|
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/* Default to a fast condition variable: */
|
||||
@ -61,12 +61,12 @@ pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * cond_attr)
|
||||
|
||||
/* Process according to condition variable type: */
|
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switch (type) {
|
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/* Fast condition variable: */
|
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/* Fast condition variable: */
|
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case COND_TYPE_FAST:
|
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/* Nothing to do here. */
|
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break;
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|
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/* Trap invalid condition variable types: */
|
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/* Trap invalid condition variable types: */
|
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default:
|
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/* Return an invalid argument error: */
|
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errno = EINVAL;
|
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@ -76,7 +76,8 @@ pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * cond_attr)
|
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|
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/* Check for no errors: */
|
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if (rval == 0) {
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if ((pcond = (pthread_cond_t) malloc(sizeof(struct pthread_cond))) == NULL) {
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if ((pcond = (pthread_cond_t)
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malloc(sizeof(struct pthread_cond))) == NULL) {
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errno = ENOMEM;
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rval = -1;
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} else {
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@ -106,12 +107,12 @@ pthread_cond_destroy(pthread_cond_t * cond)
|
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} else {
|
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/* Process according to condition variable type: */
|
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switch ((*cond)->c_type) {
|
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/* Fast condition variable: */
|
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/* Fast condition variable: */
|
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case COND_TYPE_FAST:
|
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/* Nothing to do here. */
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break;
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/* Trap invalid condition variable types: */
|
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/* Trap invalid condition variable types: */
|
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default:
|
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/* Return an invalid argument error: */
|
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errno = EINVAL;
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@ -147,16 +148,23 @@ pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t * mutex)
|
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|
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/* Process according to condition variable type: */
|
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switch ((*cond)->c_type) {
|
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/* Fast condition variable: */
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/* Fast condition variable: */
|
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case COND_TYPE_FAST:
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/* Queue the running thread for the condition variable: */
|
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_thread_queue_enq(&(*cond)->c_queue, _thread_run);
|
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/*
|
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* Queue the running thread for the condition
|
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* variable:
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*/
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_thread_queue_enq(&(*cond)->c_queue, _thread_run);
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/* Unlock the mutex: */
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pthread_mutex_unlock(mutex);
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/* Wait forever: */
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_thread_run->wakeup_time.tv_sec = -1;
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/* Schedule the next thread: */
|
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_thread_kern_sched_state(PS_COND_WAIT, __FILE__, __LINE__);
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_thread_kern_sched_state(PS_COND_WAIT,
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__FILE__, __LINE__);
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/* Block signals: */
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_thread_kern_sig_block(NULL);
|
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@ -165,7 +173,7 @@ pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t * mutex)
|
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rval = pthread_mutex_lock(mutex);
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break;
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|
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/* Trap invalid condition variable types: */
|
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/* Trap invalid condition variable types: */
|
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default:
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/* Return an invalid argument error: */
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errno = EINVAL;
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@ -197,7 +205,7 @@ pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex,
|
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|
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/* Process according to condition variable type: */
|
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switch ((*cond)->c_type) {
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/* Fast condition variable: */
|
||||
/* Fast condition variable: */
|
||||
case COND_TYPE_FAST:
|
||||
/* Set the wakeup time: */
|
||||
_thread_run->wakeup_time.tv_sec = abstime->tv_sec;
|
||||
@ -206,19 +214,24 @@ pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex,
|
||||
/* Reset the timeout flag: */
|
||||
_thread_run->timeout = 0;
|
||||
|
||||
/* Queue the running thread for the condition variable: */
|
||||
/*
|
||||
* Queue the running thread for the condition
|
||||
* variable:
|
||||
*/
|
||||
_thread_queue_enq(&(*cond)->c_queue, _thread_run);
|
||||
|
||||
/* Unlock the mutex: */
|
||||
if ((rval = pthread_mutex_unlock(mutex)) != 0) {
|
||||
/*
|
||||
* Cannot unlock the mutex, so remove the running
|
||||
* thread from the condition variable queue:
|
||||
* Cannot unlock the mutex, so remove the
|
||||
* running thread from the condition
|
||||
* variable queue:
|
||||
*/
|
||||
_thread_queue_deq(&(*cond)->c_queue);
|
||||
} else {
|
||||
/* Schedule the next thread: */
|
||||
_thread_kern_sched_state(PS_COND_WAIT, __FILE__, __LINE__);
|
||||
_thread_kern_sched_state(PS_COND_WAIT,
|
||||
__FILE__, __LINE__);
|
||||
|
||||
/* Block signals: */
|
||||
_thread_kern_sig_block(NULL);
|
||||
@ -235,7 +248,7 @@ pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex,
|
||||
}
|
||||
break;
|
||||
|
||||
/* Trap invalid condition variable types: */
|
||||
/* Trap invalid condition variable types: */
|
||||
default:
|
||||
/* Return an invalid argument error: */
|
||||
errno = EINVAL;
|
||||
@ -267,7 +280,7 @@ pthread_cond_signal(pthread_cond_t * cond)
|
||||
|
||||
/* Process according to condition variable type: */
|
||||
switch ((*cond)->c_type) {
|
||||
/* Fast condition variable: */
|
||||
/* Fast condition variable: */
|
||||
case COND_TYPE_FAST:
|
||||
/* Bring the next thread off the condition queue: */
|
||||
if ((pthread = _thread_queue_deq(&(*cond)->c_queue)) != NULL) {
|
||||
@ -276,7 +289,7 @@ pthread_cond_signal(pthread_cond_t * cond)
|
||||
}
|
||||
break;
|
||||
|
||||
/* Trap invalid condition variable types: */
|
||||
/* Trap invalid condition variable types: */
|
||||
default:
|
||||
/* Return an invalid argument error: */
|
||||
errno = EINVAL;
|
||||
@ -304,16 +317,20 @@ pthread_cond_broadcast(pthread_cond_t * cond)
|
||||
|
||||
/* Process according to condition variable type: */
|
||||
switch ((*cond)->c_type) {
|
||||
/* Fast condition variable: */
|
||||
/* Fast condition variable: */
|
||||
case COND_TYPE_FAST:
|
||||
/* Enter a loop to bring all threads off the condition queue: */
|
||||
while ((pthread = _thread_queue_deq(&(*cond)->c_queue)) != NULL) {
|
||||
/*
|
||||
* Enter a loop to bring all threads off the
|
||||
* condition queue:
|
||||
*/
|
||||
while ((pthread =
|
||||
_thread_queue_deq(&(*cond)->c_queue)) != NULL) {
|
||||
/* Allow the thread to run: */
|
||||
PTHREAD_NEW_STATE(pthread,PS_RUNNING);
|
||||
}
|
||||
break;
|
||||
|
||||
/* Trap invalid condition variable types: */
|
||||
/* Trap invalid condition variable types: */
|
||||
default:
|
||||
/* Return an invalid argument error: */
|
||||
errno = EINVAL;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user