libmetal
condition.h
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1 /*
2  * Copyright (c) 2016, Xilinx Inc. and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 /*
8  * @file generic/condition.h
9  * @brief Generic condition variable primitives for libmetal.
10  */
11 
12 #ifndef __METAL_CONDITION__H__
13 #error "Include metal/condition.h instead of metal/generic/condition.h"
14 #endif
15 
16 #ifndef __METAL_GENERIC_CONDITION__H__
17 #define __METAL_GENERIC_CONDITION__H__
18 
19 #include <unistd.h>
20 #include <metal/atomic.h>
21 #include <stdint.h>
22 #include <limits.h>
23 #include <errno.h>
24 
25 #ifdef __cplusplus
26 extern "C" {
27 #endif
28 
29 struct metal_condition {
30  metal_mutex_t *m;
36  atomic_int v;
37 };
38 
40 #define METAL_CONDITION_INIT { NULL, ATOMIC_VAR_INIT(0) }
41 
42 static inline void metal_condition_init(struct metal_condition *cv)
43 {
44  cv->m = NULL;
45  atomic_init(&cv->v, 0);
46 }
47 
48 static inline int metal_condition_signal(struct metal_condition *cv)
49 {
50  if (!cv)
51  return -EINVAL;
52 
54  atomic_fetch_add(&cv->v, 1);
55  return 0;
56 }
57 
58 static inline int metal_condition_broadcast(struct metal_condition *cv)
59 {
60  return metal_condition_signal(cv);
61 }
62 
63 
64 #ifdef __cplusplus
65 }
66 #endif
67 
68 #endif /* __METAL_GENERIC_CONDITION__H__ */
#define atomic_init(OBJ, VAL)
Definition: atomic.h:51
static int metal_condition_signal(struct metal_condition *cv)
Definition: condition.h:48
static int metal_condition_broadcast(struct metal_condition *cv)
Definition: condition.h:58
atomic_int v
Definition: condition.h:32
Definition: condition.h:25
static void metal_condition_init(struct metal_condition *cv)
Definition: condition.h:42
#define atomic_fetch_add(OBJ, VAL)
Definition: atomic.h:94
Definition: mutex.h:26
metal_mutex_t * m
Definition: condition.h:26
int atomic_int
Definition: atomic.h:24