1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
#include <rune/core/thread.h>
#include <rune/core/logging.h>
#include <rune/core/alloc.h>
#include <pthread.h>
#include <string.h>
#include <stdatomic.h>
static struct thread *threads = NULL;
static struct mutex *mutexes = NULL;
static int next_tid = 0;
static int next_mid = 0;
struct start_args {
struct thread *thread;
void* (*thread_fn)(void*);
void *thread_args;
};
static struct thread* _find_thread_by_handle(void *handle) {
if (threads == NULL)
return NULL;
struct list_head *temp = &threads->list;
struct thread *ret;
while (temp != NULL) {
ret = (struct thread*)((void*)temp - offsetof(struct thread, list));
if (pthread_equal(*(pthread_t*)ret->thread_handle, *(pthread_t*)handle) == 1)
return ret;
temp = temp->next;
}
return NULL;
}
static struct thread* _find_thread_by_id(int ID) {
if (threads == NULL)
return NULL;
struct list_head *temp = &threads->list;
struct thread *ret;
while (temp != NULL) {
ret = (struct thread*)((void*)temp - offsetof(struct thread, list));
if (ret->ID == ID)
return ret;
temp = temp->next;
}
return NULL;
}
static struct mutex* _find_mutex_by_id(int ID) {
if (mutexes == NULL)
return NULL;
struct list_head *temp = &mutexes->list;
struct mutex *ret;
while (temp != NULL) {
ret = (struct mutex*)((void*)temp - offsetof(struct mutex, list));
if (ret->ID == ID)
return ret;
temp = temp->next;
}
return NULL;
}
static void _cleanup_pthread(void *arg) {
struct thread *thread = (struct thread*)arg;
list_del(&thread->list);
rune_free(thread->thread_handle);
rune_free(thread);
}
static void* _startup_pthread(void *arg) {
struct start_args *start_args = (struct start_args*)arg;
void* (*thread_fn)(void *data) = start_args->thread_fn;
pthread_cleanup_push(_cleanup_pthread, start_args->thread);
if (thread_fn != NULL)
(*thread_fn)(start_args->thread_args);
pthread_cleanup_pop(1);
return NULL;
}
void rune_init_thread_api(void) {
threads = rune_alloc(sizeof(struct thread));
threads->ID = next_tid++;
threads->detached = 0;
threads->thread_handle = rune_alloc(sizeof(pthread_t));
*(pthread_t*)threads->thread_handle = pthread_self();
pthread_cleanup_push(_cleanup_pthread, threads);
pthread_cleanup_pop(0);
}
int rune_thread_init(void* (*thread_fn)(void *data), void *data, int detached) {
struct thread *thread = rune_alloc(sizeof(struct thread));
thread->ID = next_tid++;
thread->detached = detached;
thread->thread_handle = rune_alloc(sizeof(pthread_t));
list_add(&thread->list, &threads->list);
struct start_args *args = rune_alloc(sizeof(struct start_args));
args->thread = thread;
args->thread_fn = thread_fn;
args->thread_args = data;
int retval = pthread_create(thread->thread_handle, NULL, _startup_pthread, args);
rune_free(args);
if (retval != 0) {
log_output(LOG_ERROR, "Thread creation failed: %s", strerror(retval));
return -1;
}
log_output(LOG_DEBUG, "Initialized new thread with ID=%d", thread->ID);
if (detached == 1) {
log_output(LOG_DEBUG, "Thread %d has been detached, join no longer possible");
pthread_detach(*(pthread_t*)thread->thread_handle);
}
return thread->ID;
}
int rune_thread_cancel(int ID) {
log_output(LOG_DEBUG, "Received cancel request for thread %d", ID);
struct thread *thread = _find_thread_by_id(ID);
if (thread == NULL) {
log_output(LOG_ERROR, "Thread %d does not exist", ID);
return -1;
}
pthread_cancel(*((pthread_t*)thread->thread_handle));
return 0;
}
int rune_thread_join(int ID, void **retval) {
struct thread *thread = _find_thread_by_id(ID);
if (thread == NULL)
return 0;
if (thread->detached == 1) {
log_output(LOG_ERROR, "Cannot join thread %d, detached", thread->ID);
return -1;
}
pthread_join(*((pthread_t*)thread->thread_handle), retval);
return 0;
}
int rune_thread_self(void) {
pthread_t cur = pthread_self();
struct thread *ret = _find_thread_by_handle((void*)&cur);
if (ret != NULL)
return ret->ID;
return -1;
}
void rune_thread_exit(void *retval) {
pthread_t cur = pthread_self();
struct thread *self = _find_thread_by_handle((void*)&cur);
log_output(LOG_DEBUG, "Thread %d called thread_exit", self->ID);
pthread_exit(retval);
}
int rune_mutex_init(void) {
struct mutex *mutex = rune_alloc(sizeof(struct mutex));
mutex->ID = next_mid++;
mutex->mutex_handle = rune_alloc(sizeof(pthread_mutex_t));
pthread_mutex_init((pthread_mutex_t*)mutex->mutex_handle, NULL);
if (mutexes == NULL)
mutexes = mutex;
else
list_add(&mutex->list, &mutexes->list);
return mutex->ID;
}
int rune_mutex_destroy(int ID) {
struct mutex *mutex = _find_mutex_by_id(ID);
rune_free(mutex->mutex_handle);
list_del(&mutex->list);
rune_free(mutex);
}
int rune_mutex_lock(int ID) {
struct mutex *mutex = _find_mutex_by_id(ID);
int retval = pthread_mutex_lock((pthread_mutex_t*)mutex->mutex_handle);
if (retval != 0) {
char *str = strerror(retval);
log_output(LOG_ERROR, "Cannot lock mutex %d: %s", mutex->ID, str);
}
}
int rune_mutex_unlock(int ID) {
struct mutex *mutex = _find_mutex_by_id(ID);
int retval = pthread_mutex_unlock((pthread_mutex_t*)mutex->mutex_handle);
if (retval != 0) {
char *str = strerror(retval);
log_output(LOG_ERROR, "Cannot unlock mutex %d: %s", mutex->ID, str);
}
}
|
