2 #include "threads-model.h"
6 #include "snapshot-interface.h"
10 #include <condition_variable>
13 /* global "model" object */
15 #include "execution.h"
17 int pthread_create(pthread_t *t, const pthread_attr_t * attr,
18 pthread_start_t start_routine, void * arg) {
19 struct pthread_params params = { start_routine, arg };
21 ModelAction *act = new ModelAction(PTHREAD_CREATE, std::memory_order_seq_cst, t, (uint64_t)¶ms);
23 /* seq_cst is just a 'don't care' parameter */
24 model->switch_to_master(act);
29 int pthread_join(pthread_t t, void **value_ptr) {
30 // Thread *th = model->get_pthread(t);
31 ModelExecution *execution = model->get_execution();
32 Thread *th = execution->get_pthread(t);
34 model->switch_to_master(new ModelAction(PTHREAD_JOIN, std::memory_order_seq_cst, th, id_to_int(th->get_id())));
38 void *rtval = th->get_pthread_return();
44 void pthread_exit(void *value_ptr) {
45 Thread * th = thread_current();
46 model->switch_to_master(new ModelAction(THREAD_FINISH, std::memory_order_seq_cst, th));
47 while(1) ;//make warning goaway
50 int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) {
52 model = new ModelChecker();
55 cdsc::mutex *m = new cdsc::mutex();
57 ModelExecution *execution = model->get_execution();
58 execution->getMutexMap()->put(p_mutex, m);
62 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
63 ModelExecution *execution = model->get_execution();
65 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
66 instead of pthread_mutex_init, or where *p_mutex is not stored
67 in the execution->mutex_map for some reason. */
68 if (!execution->getMutexMap()->contains(p_mutex)) {
69 pthread_mutex_init(p_mutex, NULL);
72 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
83 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
84 ModelExecution *execution = model->get_execution();
85 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
88 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
89 ModelExecution *execution = model->get_execution();
90 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
95 printf("try to unlock an untracked pthread_mutex\n");
101 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
102 const struct timespec *__restrict abstime) {
103 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
106 ModelExecution *execution = model->get_execution();
107 if (!execution->mutex_map.contains(p_mutex)) {
108 pthread_mutex_init(p_mutex, NULL);
110 cdsc::mutex *m = execution->mutex_map.get(p_mutex);
115 printf("something is wrong with pthread_mutex_timedlock\n");
118 printf("pthread_mutex_timedlock is called. It is currently implemented as a normal lock operation without no timeout\n");
123 pthread_t pthread_self() {
124 Thread* th = model->get_current_thread();
125 return (pthread_t)th->get_id();
128 int pthread_key_delete(pthread_key_t) {
129 model_print("key_delete is called\n");
133 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
134 cdsc::condition_variable *v = new cdsc::condition_variable();
136 ModelExecution *execution = model->get_execution();
137 execution->getCondMap()->put(p_cond, v);
141 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
142 ModelExecution *execution = model->get_execution();
143 if ( !execution->getCondMap()->contains(p_cond) )
144 pthread_cond_init(p_cond, NULL);
146 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
147 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
153 int pthread_cond_timedwait(pthread_cond_t *p_cond,
154 pthread_mutex_t *p_mutex, const struct timespec *abstime) {
155 // implement cond_timedwait as a noop and let the scheduler decide which thread goes next
156 ModelExecution *execution = model->get_execution();
158 if ( !execution->getCondMap()->contains(p_cond) )
159 pthread_cond_init(p_cond, NULL);
160 if ( !execution->getMutexMap()->contains(p_mutex) )
161 pthread_mutex_init(p_mutex, NULL);
163 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
164 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
166 model->switch_to_master(new ModelAction(NOOP, std::memory_order_seq_cst, v));
168 // printf("timed_wait called\n");
172 int pthread_cond_signal(pthread_cond_t *p_cond) {
173 // notify only one blocked thread
174 ModelExecution *execution = model->get_execution();
175 if ( !execution->getCondMap()->contains(p_cond) )
176 pthread_cond_init(p_cond, NULL);
178 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);