diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/multiprocessing.c | 35 |
1 files changed, 9 insertions, 26 deletions
diff --git a/src/multiprocessing.c b/src/multiprocessing.c index 7452314..433d57a 100644 --- a/src/multiprocessing.c +++ b/src/multiprocessing.c @@ -11,10 +11,9 @@ int child(struct MultiProcessingPool *pool, struct MultiProcessingTask *task, co char *cwd = NULL; FILE *fp_log = NULL; - // Synchronize sub-process startup - // Stop here until summoned by mp_pool_join() - if (sem_wait(task->gate) < 0) { - perror("sem_wait failed"); + // The task starts inside the requested working directory + if (chdir(task->working_dir)) { + perror(task->working_dir); exit(1); } @@ -142,16 +141,6 @@ struct MultiProcessingTask *mp_pool_task(struct MultiProcessingPool *pool, const fflush(tp); fclose(tp); - // Create a uniquely named semaphore. - // This is used by the child process to prevent task execution until mp_pool_join is called - char sema_name[PATH_MAX] = {0}; - sprintf(sema_name, "/sem-%zu-%s-%s", mp_global_task_count, pool->ident, slot->ident); - sem_unlink(sema_name); - slot->gate = sem_open(sema_name, O_CREAT, 0644, 0); - if (slot->gate == SEM_FAILED) { - perror("sem_open failed"); - exit(1); - } // Execute task if (mp_task_fork(pool, slot, cmd)) { @@ -265,11 +254,12 @@ int mp_pool_join(struct MultiProcessingPool *pool, size_t jobs, size_t flags) { } for (size_t i = lower_i; i < upper_i; i++) { struct MultiProcessingTask *slot = &pool->task[i]; - // Unlock the semaphore to allow the queued processes to start up - if (sem_post(slot->gate) < 0) { - perror("sem_post failed"); - exit(1); - } + if (slot->status == -1) { + if (mp_task_fork(pool, slot)) { + fprintf(stderr, "%s: mp_task_fork failed\n", slot->ident); + exit(1); + } + } // Has the child been processed already? if (slot->pid == MP_POOL_PID_UNUSED) { @@ -430,13 +420,6 @@ struct MultiProcessingPool *mp_pool_init(const char *ident, const char *log_root void mp_pool_free(struct MultiProcessingPool **pool) { for (size_t i = 0; i < (*pool)->num_alloc; i++) { - // Close all semaphores - if ((*pool)->task[i].gate) { - if (sem_close((*pool)->task[i].gate) < 0) { - perror("sem_close failed"); - exit(1); - } - } } // Unmap all pool tasks if ((*pool)->task) { |