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| 1 | |
| 2 #include <stdlib.h> | |
| 3 #include <lwp/lwp.h> | |
| 4 #include <lwp/stackdep.h> | |
| 5 | |
| 6 #define STACKSIZE 1000 /* stacksize for a thread */ | |
| 7 #define NSTACKS 2 /* # stacks to be put in cache initially */ | |
| 8 | |
| 9 struct lock { | |
| 10 int lock_locked; | |
| 11 cv_t lock_condvar; | |
| 12 mon_t lock_monitor; | |
| 13 }; | |
| 14 | |
| 15 | |
| 16 /* | |
| 17 * Initialization. | |
| 18 */ | |
| 19 static void PyThread__init_thread(void) | |
| 20 { | |
| 21 lwp_setstkcache(STACKSIZE, NSTACKS); | |
| 22 } | |
| 23 | |
| 24 /* | |
| 25 * Thread support. | |
| 26 */ | |
| 27 | |
| 28 | |
| 29 long PyThread_start_new_thread(void (*func)(void *), void *arg) | |
| 30 { | |
| 31 thread_t tid; | |
| 32 int success; | |
| 33 dprintf(("PyThread_start_new_thread called\n")); | |
| 34 if (!initialized) | |
| 35 PyThread_init_thread(); | |
| 36 success = lwp_create(&tid, func, MINPRIO, 0, lwp_newstk(), 1, arg); | |
| 37 return success < 0 ? -1 : 0; | |
| 38 } | |
| 39 | |
| 40 long PyThread_get_thread_ident(void) | |
| 41 { | |
| 42 thread_t tid; | |
| 43 if (!initialized) | |
| 44 PyThread_init_thread(); | |
| 45 if (lwp_self(&tid) < 0) | |
| 46 return -1; | |
| 47 return tid.thread_id; | |
| 48 } | |
| 49 | |
| 50 void PyThread_exit_thread(void) | |
| 51 { | |
| 52 dprintf(("PyThread_exit_thread called\n")); | |
| 53 if (!initialized) | |
| 54 exit(0); | |
| 55 lwp_destroy(SELF); | |
| 56 } | |
| 57 | |
| 58 /* | |
| 59 * Lock support. | |
| 60 */ | |
| 61 PyThread_type_lock PyThread_allocate_lock(void) | |
| 62 { | |
| 63 struct lock *lock; | |
| 64 extern char *malloc(size_t); | |
| 65 | |
| 66 dprintf(("PyThread_allocate_lock called\n")); | |
| 67 if (!initialized) | |
| 68 PyThread_init_thread(); | |
| 69 | |
| 70 lock = (struct lock *) malloc(sizeof(struct lock)); | |
| 71 lock->lock_locked = 0; | |
| 72 (void) mon_create(&lock->lock_monitor); | |
| 73 (void) cv_create(&lock->lock_condvar, lock->lock_monitor); | |
| 74 dprintf(("PyThread_allocate_lock() -> %p\n", lock)); | |
| 75 return (PyThread_type_lock) lock; | |
| 76 } | |
| 77 | |
| 78 void PyThread_free_lock(PyThread_type_lock lock) | |
| 79 { | |
| 80 dprintf(("PyThread_free_lock(%p) called\n", lock)); | |
| 81 mon_destroy(((struct lock *) lock)->lock_monitor); | |
| 82 free((char *) lock); | |
| 83 } | |
| 84 | |
| 85 int PyThread_acquire_lock(PyThread_type_lock lock, int waitflag) | |
| 86 { | |
| 87 int success; | |
| 88 | |
| 89 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag)); | |
| 90 success = 0; | |
| 91 | |
| 92 (void) mon_enter(((struct lock *) lock)->lock_monitor); | |
| 93 if (waitflag) | |
| 94 while (((struct lock *) lock)->lock_locked) | |
| 95 cv_wait(((struct lock *) lock)->lock_condvar); | |
| 96 if (!((struct lock *) lock)->lock_locked) { | |
| 97 success = 1; | |
| 98 ((struct lock *) lock)->lock_locked = 1; | |
| 99 } | |
| 100 cv_broadcast(((struct lock *) lock)->lock_condvar); | |
| 101 mon_exit(((struct lock *) lock)->lock_monitor); | |
| 102 dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success)); | |
| 103 return success; | |
| 104 } | |
| 105 | |
| 106 void PyThread_release_lock(PyThread_type_lock lock) | |
| 107 { | |
| 108 dprintf(("PyThread_release_lock(%p) called\n", lock)); | |
| 109 (void) mon_enter(((struct lock *) lock)->lock_monitor); | |
| 110 ((struct lock *) lock)->lock_locked = 0; | |
| 111 cv_broadcast(((struct lock *) lock)->lock_condvar); | |
| 112 mon_exit(((struct lock *) lock)->lock_monitor); | |
| 113 } | |
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