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) {
20 snapshot_system_init(10000, 1024, 1024, 40000);
21 model = new ModelChecker();
22 model->startChecker();
25 struct pthread_params params = { start_routine, arg };
27 ModelAction *act = new ModelAction(PTHREAD_CREATE, std::memory_order_seq_cst, t, (uint64_t)¶ms);
29 /* seq_cst is just a 'don't care' parameter */
30 model->switch_to_master(act);
35 int pthread_join(pthread_t t, void **value_ptr) {
36 // Thread *th = model->get_pthread(t);
37 ModelExecution *execution = model->get_execution();
38 Thread *th = execution->get_pthread(t);
40 model->switch_to_master(new ModelAction(PTHREAD_JOIN, std::memory_order_seq_cst, th, id_to_int(th->get_id())));
44 void *rtval = th->get_pthread_return();
50 int pthread_detach(pthread_t t) {
56 void pthread_exit(void *value_ptr) {
57 Thread * th = thread_current();
58 model->switch_to_master(new ModelAction(THREAD_FINISH, std::memory_order_seq_cst, th));
59 while(1) ;//make warning goaway
62 int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) {
63 cdsc::snapmutex *m = new cdsc::snapmutex();
66 snapshot_system_init(10000, 1024, 1024, 40000);
67 model = new ModelChecker();
68 model->startChecker();
71 ModelExecution *execution = model->get_execution();
72 execution->getMutexMap()->put(p_mutex, m);
77 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
79 snapshot_system_init(10000, 1024, 1024, 40000);
80 model = new ModelChecker();
81 model->startChecker();
85 ModelExecution *execution = model->get_execution();
87 /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
88 instead of pthread_mutex_init, or where *p_mutex is not stored
89 in the execution->mutex_map for some reason. */
90 if (!execution->getMutexMap()->contains(p_mutex)) {
91 pthread_mutex_init(p_mutex, NULL);
94 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
105 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
106 ModelExecution *execution = model->get_execution();
107 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
108 return m->try_lock();
110 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
111 ModelExecution *execution = model->get_execution();
112 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
117 printf("try to unlock an untracked pthread_mutex\n");
123 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
124 const struct timespec *__restrict abstime) {
125 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
128 ModelExecution *execution = model->get_execution();
129 if (!execution->mutex_map.contains(p_mutex)) {
130 pthread_mutex_init(p_mutex, NULL);
132 cdsc::snapmutex *m = execution->mutex_map.get(p_mutex);
137 printf("something is wrong with pthread_mutex_timedlock\n");
140 printf("pthread_mutex_timedlock is called. It is currently implemented as a normal lock operation without no timeout\n");
145 pthread_t pthread_self() {
146 Thread* th = model->get_current_thread();
147 return (pthread_t)th->get_id();
150 int pthread_key_delete(pthread_key_t) {
151 model_print("key_delete is called\n");
155 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
156 cdsc::snapcondition_variable *v = new cdsc::snapcondition_variable();
158 ModelExecution *execution = model->get_execution();
159 execution->getCondMap()->put(p_cond, v);
163 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
164 ModelExecution *execution = model->get_execution();
165 if ( !execution->getCondMap()->contains(p_cond) )
166 pthread_cond_init(p_cond, NULL);
168 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
169 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
175 int pthread_cond_timedwait(pthread_cond_t *p_cond,
176 pthread_mutex_t *p_mutex, const struct timespec *abstime) {
177 // implement cond_timedwait as a noop and let the scheduler decide which thread goes next
178 ModelExecution *execution = model->get_execution();
180 if ( !execution->getCondMap()->contains(p_cond) )
181 pthread_cond_init(p_cond, NULL);
182 if ( !execution->getMutexMap()->contains(p_mutex) )
183 pthread_mutex_init(p_mutex, NULL);
185 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
186 cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
188 model->switch_to_master(new ModelAction(NOOP, std::memory_order_seq_cst, v));
190 // printf("timed_wait called\n");
194 int pthread_cond_signal(pthread_cond_t *p_cond) {
195 // notify only one blocked thread
196 ModelExecution *execution = model->get_execution();
197 if ( !execution->getCondMap()->contains(p_cond) )
198 pthread_cond_init(p_cond, NULL);
200 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);