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 *) {
51 cdsc::mutex *m = new cdsc::mutex();
52 ModelExecution *execution;
56 snapshot_system_init(10000, 1024, 1024, 40000);
57 model_init = new ModelChecker();
59 execution = model_init->get_execution();
61 execution = model->get_execution();
62 execution->getMutexMap()->put(p_mutex, m);
67 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
68 ModelExecution *execution = model->get_execution();
70 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
71 instead of pthread_mutex_init, or where *p_mutex is not stored
72 in the execution->mutex_map for some reason. */
73 if (!execution->getMutexMap()->contains(p_mutex)) {
74 pthread_mutex_init(p_mutex, NULL);
77 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
88 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
89 ModelExecution *execution = model->get_execution();
90 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
93 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
94 ModelExecution *execution = model->get_execution();
95 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
100 printf("try to unlock an untracked pthread_mutex\n");
106 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
107 const struct timespec *__restrict abstime) {
108 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
111 ModelExecution *execution = model->get_execution();
112 if (!execution->mutex_map.contains(p_mutex)) {
113 pthread_mutex_init(p_mutex, NULL);
115 cdsc::mutex *m = execution->mutex_map.get(p_mutex);
120 printf("something is wrong with pthread_mutex_timedlock\n");
123 printf("pthread_mutex_timedlock is called. It is currently implemented as a normal lock operation without no timeout\n");
128 pthread_t pthread_self() {
129 Thread* th = model->get_current_thread();
130 return (pthread_t)th->get_id();
133 int pthread_key_delete(pthread_key_t) {
134 model_print("key_delete is called\n");
138 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
139 cdsc::condition_variable *v = new cdsc::condition_variable();
141 ModelExecution *execution = model->get_execution();
142 execution->getCondMap()->put(p_cond, v);
146 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
147 ModelExecution *execution = model->get_execution();
148 if ( !execution->getCondMap()->contains(p_cond) )
149 pthread_cond_init(p_cond, NULL);
151 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
152 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
158 int pthread_cond_timedwait(pthread_cond_t *p_cond,
159 pthread_mutex_t *p_mutex, const struct timespec *abstime) {
160 // implement cond_timedwait as a noop and let the scheduler decide which thread goes next
161 ModelExecution *execution = model->get_execution();
163 if ( !execution->getCondMap()->contains(p_cond) )
164 pthread_cond_init(p_cond, NULL);
165 if ( !execution->getMutexMap()->contains(p_mutex) )
166 pthread_mutex_init(p_mutex, NULL);
168 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);
169 cdsc::mutex *m = execution->getMutexMap()->get(p_mutex);
171 model->switch_to_master(new ModelAction(NOOP, std::memory_order_seq_cst, v));
173 // printf("timed_wait called\n");
177 int pthread_cond_signal(pthread_cond_t *p_cond) {
178 // notify only one blocked thread
179 ModelExecution *execution = model->get_execution();
180 if ( !execution->getCondMap()->contains(p_cond) )
181 pthread_cond_init(p_cond, NULL);
183 cdsc::condition_variable *v = execution->getCondMap()->get(p_cond);