Changeset 7918fce in mainline for kernel/generic/src/ipc/ipc.c

Timestamp:

2007-07-11T20:31:45Z (17 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

975f62f

Parents:

398d967

Message:

Implement a new mechanism for copying data between two address spaces based on
IPC. New system method IPC_M_DATA_SEND is introduced. The implementation is
generic and does not make use of any possible architecture optimizations such as
direct copy from one address space to another.

File:

• kernel/generic/src/ipc/ipc.c (modified) (3 diffs)

kernel/generic/src/ipc/ipc.c

@@ -68 +68 @@
         call->callerbox = &TASK->answerbox;
         call->sender = TASK;
+        call->buffer = NULL;
 }
 
@@ -108 +109 @@
 {
         ASSERT(!(call->flags & IPC_CALL_STATIC_ALLOC));
+        /* Check to see if we have data in the IPC_M_DATA_SEND buffer. */
+        if (call->buffer)
+                free(call->buffer);
         slab_free(ipc_call_slab, call);
 }
@@ -293 +297 @@
         
         spinlock_lock(&phone->lock);
-        if (phone->state == IPC_PHONE_FREE || phone->state == IPC_PHONE_HUNGUP ||
+        if (phone->state == IPC_PHONE_FREE ||
+            phone->state == IPC_PHONE_HUNGUP ||
             phone->state == IPC_PHONE_CONNECTING) {
                 spinlock_unlock(&phone->lock);