Changeset bc7d44c in mainline for kernel

Timestamp:

2009-08-21T07:33:36Z (16 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.

Location:

kernel/generic

Files:

• include/ipc/sysipc.h (modified) (1 diff)
• include/synch/waitq.h (modified) (1 diff)
• include/syscall/syscall.h (modified) (1 diff)
• src/ipc/sysipc.c (modified) (2 diffs)
• src/synch/waitq.c (modified) (1 diff)
• src/syscall/syscall.c (modified) (1 diff)

kernel/generic/include/ipc/sysipc.h

@@ -52 +52 @@
 unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec,
     int nonblocking);
+unative_t sys_ipc_poke(void);
 unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid,
     unative_t method, unative_t arg1, unative_t arg2, int mode);

kernel/generic/include/synch/waitq.h

@@ -68 +68 @@
 struct thread;
 
-extern void waitq_initialize(waitq_t *wq);
-extern int waitq_sleep_timeout(waitq_t *wq, uint32_t usec, int flags);
-extern ipl_t waitq_sleep_prepare(waitq_t *wq);
-extern int waitq_sleep_timeout_unsafe(waitq_t *wq, uint32_t usec, int flags);
-extern void waitq_sleep_finish(waitq_t *wq, int rc, ipl_t ipl);
-extern void waitq_wakeup(waitq_t *wq, wakeup_mode_t mode);
-extern void _waitq_wakeup_unsafe(waitq_t *wq, wakeup_mode_t mode);
-extern void waitq_interrupt_sleep(struct thread *t);
+extern void waitq_initialize(waitq_t *);
+extern int waitq_sleep_timeout(waitq_t *, uint32_t, int);
+extern ipl_t waitq_sleep_prepare(waitq_t *);
+extern int waitq_sleep_timeout_unsafe(waitq_t *, uint32_t, int);
+extern void waitq_sleep_finish(waitq_t *, int, ipl_t);
+extern void waitq_wakeup(waitq_t *, wakeup_mode_t);
+extern void _waitq_wakeup_unsafe(waitq_t *, wakeup_mode_t);
+extern void waitq_interrupt_sleep(struct thread *);
+extern void waitq_unsleep(waitq_t *);
 
 #endif

kernel/generic/include/syscall/syscall.h

@@ -66 +66 @@
         SYS_IPC_FORWARD_SLOW,
         SYS_IPC_WAIT,
+        SYS_IPC_POKE,
         SYS_IPC_HANGUP,
         SYS_IPC_REGISTER_IRQ,

kernel/generic/src/ipc/sysipc.c

@@ -44 +44 @@
 #include <ipc/ipcrsc.h>
 #include <ipc/kbox.h>
+#include <synch/waitq.h>
 #include <udebug/udebug_ipc.h>
 #include <arch/interrupt.h>
@@ -1051 +1052 @@
 }
 
+/** Interrupt one thread from sys_ipc_wait_for_call(). */
+unative_t sys_ipc_poke(void)
+{
+        waitq_unsleep(&TASK->answerbox.wq);     
+        return EOK;
+}
+
 /** Connect an IRQ handler to a task.
  *

kernel/generic/src/synch/waitq.c

@@ -171 +171 @@
 out:
         spinlock_unlock(&threads_lock);
+        interrupts_restore(ipl);
+}
+
+/** Interrupt the first thread sleeping in the wait queue.
+ *
+ * Note that the caller somehow needs to know that the thread to be interrupted
+ * is sleeping interruptibly.
+ *
+ * @param wq            Pointer to wait queue.
+ */
+void waitq_unsleep(waitq_t *wq)
+{
+        ipl_t ipl;
+
+        ipl = interrupts_disable();
+        spinlock_lock(&wq->lock);
+
+        if (!list_empty(&wq->head)) {
+                thread_t *t;
+                
+                t = list_get_instance(wq->head.next, thread_t, wq_link);
+                spinlock_lock(&t->lock);
+                ASSERT(t->sleep_interruptible);
+                if (t->timeout_pending && timeout_unregister(&t->sleep_timeout))
+                        t->timeout_pending = false;
+                list_remove(&t->wq_link);
+                t->saved_context = t->sleep_interruption_context;
+                t->sleep_queue = NULL;
+                spinlock_unlock(&t->lock);
+                thread_ready(t);
+        }
+
+        spinlock_unlock(&wq->lock);
         interrupts_restore(ipl);
 }

kernel/generic/src/syscall/syscall.c

@@ -137 +137 @@
         (syshandler_t) sys_ipc_forward_slow,
         (syshandler_t) sys_ipc_wait_for_call,
+        (syshandler_t) sys_ipc_poke,
         (syshandler_t) sys_ipc_hangup,
         (syshandler_t) sys_ipc_register_irq,