Remove duplicate functions
[c11tester.git] / pthread.cc
1 #include "common.h"
2 #include "threads-model.h"
3 #include "action.h"
4 #include "mypthread.h"
5
6 #include "snapshot-interface.h"
7 #include "datarace.h"
8
9 #include "mutex.h"
10 #include <condition_variable>
11
12 /* global "model" object */
13 #include "model.h"
14 #include "execution.h"
15 #include <errno.h>
16
17 int pthread_create(pthread_t *t, const pthread_attr_t * attr,
18                                                                          pthread_start_t start_routine, void * arg) {
19         if (!model) {
20                 snapshot_system_init(10000, 1024, 1024, 40000);
21                 model = new ModelChecker();
22                 model->startChecker();
23         }
24
25         struct pthread_params params = { start_routine, arg };
26
27         ModelAction *act = new ModelAction(PTHREAD_CREATE, std::memory_order_seq_cst, t, (uint64_t)&params);
28
29         /* seq_cst is just a 'don't care' parameter */
30         model->switch_to_master(act);
31
32         return 0;
33 }
34
35 int pthread_join(pthread_t t, void **value_ptr) {
36         ModelExecution *execution = model->get_execution();
37         Thread *th = execution->get_pthread(t);
38
39         model->switch_to_master(new ModelAction(PTHREAD_JOIN, std::memory_order_seq_cst, th, id_to_int(th->get_id())));
40
41         if ( value_ptr ) {
42                 // store return value
43                 void *rtval = th->get_pthread_return();
44                 *value_ptr = rtval;
45         }
46         return 0;
47 }
48
49 int pthread_detach(pthread_t t) {
50         //Doesn't do anything
51         //Return success
52         return 0;
53 }
54
55 /* Take care of both pthread_yield and c++ thread yield */
56 int sched_yield() {
57         model->switch_to_master(new ModelAction(THREAD_YIELD, std::memory_order_seq_cst, thread_current(), VALUE_NONE));
58         return 0;
59 }
60
61 void pthread_exit(void *value_ptr) {
62         Thread * th = thread_current();
63         th->set_pthread_return(value_ptr);
64         model->switch_to_master(new ModelAction(THREADONLY_FINISH, std::memory_order_seq_cst, th));
65         //Need to exit so we don't return to the program
66         real_pthread_exit(NULL);
67 }
68
69 int pthread_mutex_init(pthread_mutex_t *p_mutex, const pthread_mutexattr_t *) {
70         if (!model) {
71                 snapshot_system_init(10000, 1024, 1024, 40000);
72                 model = new ModelChecker();
73                 model->startChecker();
74         }
75         cdsc::snapmutex *m = new cdsc::snapmutex();
76
77         ModelExecution *execution = model->get_execution();
78         execution->getMutexMap()->put(p_mutex, m);
79
80         return 0;
81 }
82
83 int pthread_mutex_lock(pthread_mutex_t *p_mutex) {
84         if (!model) {
85                 snapshot_system_init(10000, 1024, 1024, 40000);
86                 model = new ModelChecker();
87                 model->startChecker();
88         }
89
90         ModelExecution *execution = model->get_execution();
91
92         /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
93            instead of pthread_mutex_init, or where *p_mutex is not stored
94            in the execution->mutex_map for some reason. */
95         if (!execution->getMutexMap()->contains(p_mutex)) {
96                 pthread_mutex_init(p_mutex, NULL);
97         }
98
99         cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
100
101         if (m != NULL) {
102                 m->lock();
103         } else {
104                 return 1;
105         }
106
107         return 0;
108 }
109
110 int pthread_mutex_trylock(pthread_mutex_t *p_mutex) {
111         if (!model) {
112                 snapshot_system_init(10000, 1024, 1024, 40000);
113                 model = new ModelChecker();
114                 model->startChecker();
115         }
116
117         ModelExecution *execution = model->get_execution();
118         cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
119         return m->try_lock();
120 }
121 int pthread_mutex_unlock(pthread_mutex_t *p_mutex) {
122         ModelExecution *execution = model->get_execution();
123         cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
124
125         if (m != NULL) {
126                 m->unlock();
127         } else {
128                 printf("try to unlock an untracked pthread_mutex\n");
129                 return 1;
130         }
131
132         return 0;
133 }
134
135 int pthread_mutex_timedlock (pthread_mutex_t *__restrict p_mutex,
136                                                                                                                  const struct timespec *__restrict abstime) {
137 // timedlock just gives the option of giving up the lock, so return and let the scheduler decide which thread goes next
138
139         if (!model) {
140                 snapshot_system_init(10000, 1024, 1024, 40000);
141                 model = new ModelChecker();
142                 model->startChecker();
143         }
144
145         ModelExecution *execution = model->get_execution();
146
147         /* to protect the case where PTHREAD_MUTEX_INITIALIZER is used
148            instead of pthread_mutex_init, or where *p_mutex is not stored
149            in the execution->mutex_map for some reason. */
150         if (!execution->getMutexMap()->contains(p_mutex)) {
151                 pthread_mutex_init(p_mutex, NULL);
152         }
153
154         cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
155
156         if (m != NULL) {
157                 m->lock();
158                 return 0;
159         }
160
161         return 1;
162 }
163
164 pthread_t pthread_self() {
165         Thread* th = model->get_current_thread();
166         return (pthread_t)th->get_id();
167 }
168
169 int pthread_key_delete(pthread_key_t) {
170         model_print("key_delete is called\n");
171         return 0;
172 }
173
174 int pthread_cond_init(pthread_cond_t *p_cond, const pthread_condattr_t *attr) {
175         cdsc::snapcondition_variable *v = new cdsc::snapcondition_variable();
176
177         ModelExecution *execution = model->get_execution();
178         execution->getCondMap()->put(p_cond, v);
179         return 0;
180 }
181
182 int pthread_cond_wait(pthread_cond_t *p_cond, pthread_mutex_t *p_mutex) {
183         ModelExecution *execution = model->get_execution();
184         if ( !execution->getCondMap()->contains(p_cond) )
185                 pthread_cond_init(p_cond, NULL);
186         if ( !execution->getMutexMap()->contains(p_mutex) )
187                 pthread_mutex_init(p_mutex, NULL);
188
189         cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
190         cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
191
192         v->wait(*m);
193         return 0;
194 }
195
196 int pthread_cond_timedwait(pthread_cond_t *p_cond,
197                                                                                                          pthread_mutex_t *p_mutex, const struct timespec *abstime) {
198         ModelExecution *execution = model->get_execution();
199
200         if ( !execution->getCondMap()->contains(p_cond) )
201                 pthread_cond_init(p_cond, NULL);
202         if ( !execution->getMutexMap()->contains(p_mutex) )
203                 pthread_mutex_init(p_mutex, NULL);
204
205         cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
206         cdsc::snapmutex *m = execution->getMutexMap()->get(p_mutex);
207
208         model->switch_to_master(new ModelAction(ATOMIC_TIMEDWAIT, std::memory_order_seq_cst, v, (uint64_t) m));
209         m->lock();
210
211         // model_print("Timed_wait is called\n");
212         return 0;
213 }
214
215 int pthread_cond_signal(pthread_cond_t *p_cond) {
216         // notify only one blocked thread
217         ModelExecution *execution = model->get_execution();
218         if ( !execution->getCondMap()->contains(p_cond) )
219                 pthread_cond_init(p_cond, NULL);
220
221         cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
222
223         v->notify_one();
224         return 0;
225 }
226
227 int pthread_cond_broadcast(pthread_cond_t *p_cond) {
228         // notify all blocked threads
229         ModelExecution *execution = model->get_execution();
230         if ( !execution->getCondMap()->contains(p_cond) )
231                 pthread_cond_init(p_cond, NULL);
232
233         cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
234
235         v->notify_all();
236         return 0;
237 }
238
239 int pthread_cond_destroy(pthread_cond_t *p_cond) {
240         ModelExecution *execution = model->get_execution();
241
242         if (execution->getCondMap()->contains(p_cond)) {
243                 cdsc::snapcondition_variable *v = execution->getCondMap()->get(p_cond);
244                 delete v;
245                 execution->getCondMap()->remove(p_cond);
246         }
247         return 0;
248 }