diff options
Diffstat (limited to 'ports/linux/gnu/inc/tx_port.h')
| -rw-r--r-- | ports/linux/gnu/inc/tx_port.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/ports/linux/gnu/inc/tx_port.h b/ports/linux/gnu/inc/tx_port.h index dc39b5f9..70a9fb9d 100644 --- a/ports/linux/gnu/inc/tx_port.h +++ b/ports/linux/gnu/inc/tx_port.h @@ -525,7 +525,7 @@ VOID _tx_thread_interrupt_restore(UINT previous_posture); #define TX_RESTORE _tx_linux_debug_entry_insert("RESTORE", __FILE__, __LINE__); \ _tx_thread_interrupt_restore(tx_saved_posture); #endif /* TX_LINUX_DEBUG_ENABLE */ -#define tx_linux_mutex_lock(p) pthread_mutex_lock(&p) +#define tx_linux_mutex_lock(p) _tx_linux_mutex_lock_retry(&p) #define tx_linux_mutex_unlock(p) pthread_mutex_unlock(&p) #define tx_linux_mutex_recursive_unlock(p) {\ int _recursive_count = (int)tx_linux_mutex_recursive_count;\ @@ -566,6 +566,17 @@ extern CHAR _tx_version_id[]; /* Define externals for the Linux port of ThreadX. */ extern pthread_mutex_t _tx_linux_mutex; + +/* Define how long a thread waits on the Linux mutex before retrying. A thread + parked on the mutex can be suspended by the port's signal handler and so never + act on the wake-up the next unlock sends it, which leaves the wake-up lost and + every other waiter parked on a mutex that is free. */ + +#ifndef TX_LINUX_MUTEX_RETRY_NSEC +#define TX_LINUX_MUTEX_RETRY_NSEC 1000000 +#endif + +void _tx_linux_mutex_lock_retry(pthread_mutex_t *mutex); extern sem_t _tx_linux_semaphore; extern sem_t _tx_linux_semaphore_no_idle; extern ULONG _tx_linux_global_int_disabled_flag; |