Commit | Line | Data |
---|---|---|
90c3a0d4 | 1 | #include <pthread.h> |
3aac2619 | 2 | #include <pthread_extra.h> |
90c3a0d4 TM |
3 | #include <time.h> |
4 | #include <string.h> | |
5 | #include <stdio.h> | |
6 | #include <stdbool.h> | |
7 | #include <stdlib.h> | |
774d1b14 | 8 | #include <assert.h> |
90c3a0d4 | 9 | |
774d1b14 TM |
10 | bool pthread_mq_readable(pthread_mq_t *mq) { return (mq->msg_count > 0); } |
11 | bool pthread_mq_writable(pthread_mq_t *mq) { return (mq->msg_count < mq->msg_count_max); } | |
90c3a0d4 TM |
12 | |
13 | bool pthread_mq_init(pthread_mq_t *mq, size_t msg_size, size_t msg_count_max) { | |
774d1b14 TM |
14 | pthread_mutex_init(&mq->lock, NULL); |
15 | pthread_cond_init(&mq->cond_readable, NULL); | |
16 | pthread_cond_init(&mq->cond_writable, NULL); | |
63658368 | 17 | //pthread_mutexattr_setclock(&mq->lock, CLOCK_MONOTONIC); |
90c3a0d4 TM |
18 | mq->data = malloc(msg_size*msg_count_max); |
19 | mq->msg_size = msg_size; | |
20 | mq->msg_count_max = msg_count_max; | |
21 | mq->msg_count = 0; | |
22 | mq->head_idx = 0; | |
23 | mq->name = NULL; | |
24 | ||
25 | if(((msg_size*msg_count_max) > 0) && mq->data == NULL) return false; | |
26 | return true; | |
27 | } | |
28 | ||
29 | void pthread_mq_free(pthread_mq_t *mq) { | |
30 | free(mq->data); | |
31 | } | |
32 | ||
90c3a0d4 TM |
33 | void pthread_mq_cond(pthread_mq_t *mq) { |
34 | if(pthread_mq_readable(mq)) pthread_cond_broadcast(&mq->cond_readable); | |
35 | if(pthread_mq_writable(mq)) pthread_cond_broadcast(&mq->cond_writable); | |
36 | } | |
37 | ||
63658368 TM |
38 | size_t pthread_mq_waiting(pthread_mq_t *mq) { |
39 | return mq->msg_count; | |
40 | } | |
41 | ||
774d1b14 TM |
42 | bool pthread_mq_reset(pthread_mq_t *mq) { |
43 | if(pthread_mutex_lock(&mq->lock)) return false; | |
44 | mq->msg_count = 0; | |
45 | mq->head_idx = 0; | |
46 | pthread_mq_cond(mq); | |
47 | pthread_mutex_unlock(&mq->lock); | |
48 | return true; | |
49 | } | |
50 | ||
63658368 | 51 | bool pthread_mq_send_generic(pthread_mq_t *mq, void * data, bool to_front, const struct timespec *restrict abs_timeout) { |
5251b63c | 52 | //printf("S-Timed: %p\n", abs_timeout); |
3297654e TM |
53 | int ret; |
54 | ||
774d1b14 TM |
55 | //Lock queue |
56 | if(pthread_mutex_timedlock(&mq->lock, abs_timeout)) return false; | |
90c3a0d4 | 57 | |
774d1b14 | 58 | //Wait for queue to be in writable condition |
90c3a0d4 | 59 | while(!pthread_mq_writable(mq)) { |
5251b63c | 60 | //printf("S+Timed: %p\n", abs_timeout); |
3297654e TM |
61 | if(abs_timeout == NULL) { |
62 | ret = pthread_cond_wait(&mq->cond_writable, &mq->lock); | |
63 | } else { | |
5251b63c TM |
64 | //printf("STimed: %p\n", abs_timeout); |
65 | assert(abs_timeout != NULL); | |
3297654e TM |
66 | ret = pthread_cond_timedwait(&mq->cond_writable, &mq->lock, abs_timeout); |
67 | } | |
68 | if(ret) { | |
774d1b14 TM |
69 | pthread_mutex_unlock(&mq->lock); |
70 | return false; | |
71 | } | |
90c3a0d4 TM |
72 | } |
73 | ||
774d1b14 | 74 | //Write data to queue |
5251b63c | 75 | size_t idx = ( ( mq->head_idx + (to_front?mq->msg_count_max-1:mq->msg_count) ) % mq->msg_count_max ); |
90c3a0d4 TM |
76 | void *ptr = mq->data + (idx * mq->msg_size); |
77 | mq->msg_count++; | |
774d1b14 | 78 | if(to_front) mq->head_idx = (mq->msg_count_max + mq->head_idx - 1) % mq->msg_count_max; |
90c3a0d4 TM |
79 | memcpy(ptr, data, mq->msg_size); |
80 | ||
774d1b14 | 81 | //Signal conditions and unlock |
90c3a0d4 TM |
82 | pthread_mq_cond(mq); |
83 | pthread_mutex_unlock(&mq->lock); | |
84 | return true; | |
85 | } | |
86 | ||
63658368 TM |
87 | bool pthread_mq_receive_generic(pthread_mq_t *mq, void * data, bool peek, const struct timespec *restrict abs_timeout) { |
88 | int ret; | |
89 | ||
90 | //Lock queue | |
91 | if(pthread_mutex_timedlock(&mq->lock, abs_timeout)) return false; | |
92 | ||
93 | //Wait for queue to be in readable condition | |
94 | while(!pthread_mq_readable(mq)) { | |
95 | if(abs_timeout == NULL) { | |
96 | ret = pthread_cond_wait(&mq->cond_readable, &mq->lock); | |
97 | } else { | |
5251b63c TM |
98 | //printf("RTimed: %p\n", abs_timeout); |
99 | assert(abs_timeout != NULL); | |
63658368 TM |
100 | ret = pthread_cond_timedwait(&mq->cond_readable, &mq->lock, abs_timeout); |
101 | } | |
102 | if(ret) { | |
103 | pthread_mutex_unlock(&mq->lock); | |
104 | return false; | |
105 | } | |
106 | } | |
107 | ||
108 | //Read data from queue | |
109 | void *ptr = mq->data + (mq->head_idx * mq->msg_size); | |
110 | memcpy(data, ptr, mq->msg_size); | |
111 | ||
112 | //Delete data from queue if not peeking | |
113 | if(!peek) { | |
114 | mq->msg_count--; | |
115 | mq->head_idx = (mq->head_idx+1) % mq->msg_count_max; | |
116 | } | |
117 | ||
118 | //Signal conditions and unlock | |
119 | pthread_mq_cond(mq); | |
120 | pthread_mutex_unlock(&mq->lock); | |
121 | return true; | |
122 | } |