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-rw-r--r--libglusterfs/src/syncop.h40
1 files changed, 27 insertions, 13 deletions
diff --git a/libglusterfs/src/syncop.h b/libglusterfs/src/syncop.h
index cf044d40..7ede9663 100644
--- a/libglusterfs/src/syncop.h
+++ b/libglusterfs/src/syncop.h
@@ -57,7 +57,6 @@ struct synctask {
void *stack;
int woken;
int slept;
- int waitfor;
int ret;
uid_t uid;
@@ -107,6 +106,16 @@ struct synclock {
};
typedef struct synclock synclock_t;
+
+struct syncbarrier {
+ pthread_mutex_t guard; /* guard the remaining members, pair @cond */
+ pthread_cond_t cond; /* waiting non-synctasks */
+ struct list_head waitq; /* waiting synctasks */
+ int count; /* count the number of wakes */
+};
+typedef struct syncbarrier syncbarrier_t;
+
+
struct syncargs {
int op_ret;
int op_errno;
@@ -128,11 +137,13 @@ struct syncargs {
dict_t *dict;
pthread_mutex_t lock_dict;
+ syncbarrier_t barrier;
+
/* do not touch */
struct synctask *task;
pthread_mutex_t mutex;
pthread_cond_t cond;
- int wakecnt;
+ int done;
};
@@ -143,7 +154,7 @@ struct syncargs {
} else { \
pthread_mutex_init (&args->mutex, NULL); \
pthread_cond_init (&args->cond, NULL); \
- args->wakecnt = 0; \
+ args->done = 0; \
} \
} while (0)
@@ -154,7 +165,7 @@ struct syncargs {
} else { \
pthread_mutex_lock (&args->mutex); \
{ \
- args->wakecnt++; \
+ args->done = 1; \
pthread_cond_signal (&args->cond); \
} \
pthread_mutex_unlock (&args->mutex); \
@@ -162,13 +173,13 @@ struct syncargs {
} while (0)
-#define __waitfor(args, cnt) do { \
+#define __yield(args) do { \
if (args->task) { \
- synctask_waitfor (args->task, cnt); \
+ synctask_yield (args->task); \
} else { \
pthread_mutex_lock (&args->mutex); \
{ \
- while (args->wakecnt < cnt) \
+ while (!args->done) \
pthread_cond_wait (&args->cond, \
&args->mutex); \
} \
@@ -179,9 +190,6 @@ struct syncargs {
} while (0)
-#define __yield(args) __waitfor(args, 1)
-
-
#define SYNCOP(subvol, stb, cbk, op, params ...) do { \
struct synctask *task = NULL; \
call_frame_t *frame = NULL; \
@@ -225,9 +233,9 @@ void synctask_yield (struct synctask *task);
void synctask_yawn (struct synctask *task);
void synctask_waitfor (struct synctask *task, int count);
-#define synctask_barrier_init(args) __yawn (args)
-#define synctask_barrier_wait(args, n) __waitfor (args, n)
-#define synctask_barrier_wake(args) __wake (args)
+#define synctask_barrier_init(args) syncbarrier_init (&args->barrier)
+#define synctask_barrier_wait(args, n) syncbarrier_wait (&args->barrier, n)
+#define synctask_barrier_wake(args) syncbarrier_wake (&args->barrier)
int synctask_setid (struct synctask *task, uid_t uid, gid_t gid);
#define SYNCTASK_SETID(uid, gid) synctask_setid (synctask_get(), uid, gid);
@@ -256,6 +264,12 @@ int synclock_lock (synclock_t *lock);
int synclock_trylock (synclock_t *lock);
int synclock_unlock (synclock_t *lock);
+
+int syncbarrier_init (syncbarrier_t *barrier);
+int syncbarrier_wait (syncbarrier_t *barrier, int waitfor);
+int syncbarrier_wake (syncbarrier_t *barrier);
+int syncbarrier_destroy (syncbarrier_t *barrier);
+
int syncop_lookup (xlator_t *subvol, loc_t *loc, dict_t *xattr_req,
/* out */
struct iatt *iatt, dict_t **xattr_rsp, struct iatt *parent);