diff options
Diffstat (limited to 'core/arch/arm/include/kernel/mutex.h')
| -rw-r--r-- | core/arch/arm/include/kernel/mutex.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/core/arch/arm/include/kernel/mutex.h b/core/arch/arm/include/kernel/mutex.h index 1698b35..893313e 100644 --- a/core/arch/arm/include/kernel/mutex.h +++ b/core/arch/arm/include/kernel/mutex.h @@ -36,6 +36,15 @@ enum mutex_value { MUTEX_VALUE_LOCKED, }; +/* + * Positive owner ids signifies actual threads, negative ids has special + * meanings according to the defines below. Note that only the first of the + * defines is allowed in struct mutex::owener_id. + */ +#define MUTEX_OWNER_ID_NONE -1 +#define MUTEX_OWNER_ID_CONDVAR_SLEEP -2 +#define MUTEX_OWNER_ID_MUTEX_UNLOCK -3 + struct mutex { enum mutex_value value; unsigned spin_lock; /* used when operating on this struct */ @@ -44,7 +53,7 @@ struct mutex { TAILQ_ENTRY(mutex) link; }; #define MUTEX_INITIALIZER \ - { .value = MUTEX_VALUE_UNLOCKED, .owner_id = -1, \ + { .value = MUTEX_VALUE_UNLOCKED, .owner_id = MUTEX_OWNER_ID_NONE, \ .wq = WAIT_QUEUE_INITIALIZER, } TAILQ_HEAD(mutex_head, mutex); |