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core/mutex: support locked initialization

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This commit is contained in:
Victor Arino 2016-12-14 10:10:41 +01:00
parent ba23fb55f7
commit ea12433a8d
2 changed files with 12 additions and 2 deletions
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12
core/include/mutex.h
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@ -49,6 +49,18 @@ typedef struct {
*/ */
#define MUTEX_INIT { { NULL } } #define MUTEX_INIT { { NULL } }
/**
* @brief Static initializer for mutex_t with a locked mutex
*/
#define MUTEX_INIT_LOCKED { { MUTEX_LOCKED } }
/**
* @internal
* @brief This is the value of the mutex when locked and no threads are waiting
* for it
*/
#define MUTEX_LOCKED ((void *)-1)
/** /**
* @brief Initializes a mutex object. * @brief Initializes a mutex object.
* @details For initialization of variables use MUTEX_INIT instead. * @details For initialization of variables use MUTEX_INIT instead.

2
core/mutex.c
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@ -35,8 +35,6 @@
#define ENABLE_DEBUG (0) #define ENABLE_DEBUG (0)
#include "debug.h" #include "debug.h"
#define MUTEX_LOCKED ((void*)-1)
int _mutex_lock(mutex_t *mutex, int blocking) int _mutex_lock(mutex_t *mutex, int blocking)
{ {
unsigned irqstate = irq_disable(); unsigned irqstate = irq_disable();