diff options
Diffstat (limited to 'src/3rdparty/ptmalloc/sysdeps/pthread/thread-st.h')
-rw-r--r-- | src/3rdparty/ptmalloc/sysdeps/pthread/thread-st.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/3rdparty/ptmalloc/sysdeps/pthread/thread-st.h b/src/3rdparty/ptmalloc/sysdeps/pthread/thread-st.h new file mode 100644 index 0000000000..f97a0a3552 --- /dev/null +++ b/src/3rdparty/ptmalloc/sysdeps/pthread/thread-st.h @@ -0,0 +1,111 @@ +/* + * $Id: thread-st.h$ + * pthread version + * by Wolfram Gloger 2004 + */ + +#include <pthread.h> +#include <stdio.h> + +pthread_cond_t finish_cond = PTHREAD_COND_INITIALIZER; +pthread_mutex_t finish_mutex = PTHREAD_MUTEX_INITIALIZER; + +#ifndef USE_PTHREADS_STACKS +#define USE_PTHREADS_STACKS 0 +#endif + +#ifndef STACKSIZE +#define STACKSIZE 32768 +#endif + +struct thread_st { + char *sp; /* stack pointer, can be 0 */ + void (*func)(struct thread_st* st); /* must be set by user */ + pthread_t id; + int flags; + struct user_data u; +}; + +static void +thread_init(void) +{ + printf("Using posix threads.\n"); + pthread_cond_init(&finish_cond, NULL); + pthread_mutex_init(&finish_mutex, NULL); +} + +static void * +thread_wrapper(void *ptr) +{ + struct thread_st *st = (struct thread_st*)ptr; + + /*printf("begin %p\n", st->sp);*/ + st->func(st); + pthread_mutex_lock(&finish_mutex); + st->flags = 1; + pthread_mutex_unlock(&finish_mutex); + pthread_cond_signal(&finish_cond); + /*printf("end %p\n", st->sp);*/ + return NULL; +} + +/* Create a thread. */ +static int +thread_create(struct thread_st *st) +{ + st->flags = 0; + { + pthread_attr_t* attr_p = 0; +#if USE_PTHREADS_STACKS + pthread_attr_t attr; + + pthread_attr_init (&attr); + if(!st->sp) + st->sp = malloc(STACKSIZE+16); + if(!st->sp) + return -1; + if(pthread_attr_setstacksize(&attr, STACKSIZE)) + fprintf(stderr, "error setting stacksize"); + else + pthread_attr_setstackaddr(&attr, st->sp + STACKSIZE); + /*printf("create %p\n", st->sp);*/ + attr_p = &attr; +#endif + return pthread_create(&st->id, attr_p, thread_wrapper, st); + } + return 0; +} + +/* Wait for one of several subthreads to finish. */ +static void +wait_for_thread(struct thread_st st[], int n_thr, + int (*end_thr)(struct thread_st*)) +{ + int i; + + pthread_mutex_lock(&finish_mutex); + for(;;) { + int term = 0; + for(i=0; i<n_thr; i++) + if(st[i].flags) { + /*printf("joining %p\n", st[i].sp);*/ + if(pthread_join(st[i].id, NULL) == 0) { + st[i].flags = 0; + if(end_thr) + end_thr(&st[i]); + } else + fprintf(stderr, "can't join\n"); + ++term; + } + if(term > 0) + break; + pthread_cond_wait(&finish_cond, &finish_mutex); + } + pthread_mutex_unlock(&finish_mutex); +} + +/* + * Local variables: + * tab-width: 4 + * End: + */ |