Changeset bc7d44c in mainline for uspace/lib/libc/generic/async.c

Timestamp:

2009-08-21T07:33:36Z (15 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

af8e565

Parents:

b9c7425 (diff), 207e208e (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge fibril synchronization improvements.

File:

• uspace/lib/libc/generic/async.c (modified) (3 diffs)

uspace/lib/libc/generic/async.c

@@ -106 +106 @@
 
 atomic_t async_futex = FUTEX_INITIALIZER;
+
+/** Number of threads waiting for IPC in the kernel. */
+atomic_t threads_in_ipc_wait = { 0 };
 
 /** Structures of this type represent a waiting fibril. */
@@ -683 +686 @@
                 
                 futex_up(&async_futex);
+
+                atomic_inc(&threads_in_ipc_wait);
                 
                 ipc_call_t call;
@@ -688 +693 @@
                     SYNCH_FLAGS_NONE);
                 
+                atomic_dec(&threads_in_ipc_wait);
+
                 if (!callid) {
                         handle_expired_timeouts();