ide: Update command code definitions as per ACS-2 Table B.2

[qemu.git] / aio.c

diff --git a/aio.c b/aio.c
index da18443369ec5c21079935b75366578216a6fd15..1239ca7bd2ad37bed6b51d33d7f35f60571d8552 100644 (file)
--- a/aio.c
+++ b/aio.c
@@ -33,6 +33,7 @@ struct AioHandler
     IOHandler *io_read;
     IOHandler *io_write;
     AioFlushHandler *io_flush;
+    AioProcessQueue *io_process_queue;
     int deleted;
     void *opaque;
     QLIST_ENTRY(AioHandler) node;
@@ -55,6 +56,7 @@ int qemu_aio_set_fd_handler(int fd,
                             IOHandler *io_read,
                             IOHandler *io_write,
                             AioFlushHandler *io_flush,
+                            AioProcessQueue *io_process_queue,
                             void *opaque)
 {
     AioHandler *node;
@@ -73,13 +75,13 @@ int qemu_aio_set_fd_handler(int fd,
                  * releasing the walking_handlers lock.
                  */
                 QLIST_REMOVE(node, node);
-                qemu_free(node);
+                g_free(node);
             }
         }
     } else {
         if (node == NULL) {
             /* Alloc and insert if it's not already there */
-            node = qemu_mallocz(sizeof(AioHandler));
+            node = g_malloc0(sizeof(AioHandler));
             node->fd = fd;
             QLIST_INSERT_HEAD(&aio_handlers, node, node);
         }
@@ -87,6 +89,7 @@ int qemu_aio_set_fd_handler(int fd,
         node->io_read = io_read;
         node->io_write = io_write;
         node->io_flush = io_flush;
+        node->io_process_queue = io_process_queue;
         node->opaque = opaque;
     }
 
@@ -110,11 +113,33 @@ void qemu_aio_flush(void)
         qemu_aio_wait();
 
         QLIST_FOREACH(node, &aio_handlers, node) {
-            ret |= node->io_flush(node->opaque);
+            if (node->io_flush) {
+                ret |= node->io_flush(node->opaque);
+            }
         }
     } while (qemu_bh_poll() || ret > 0);
 }
 
+int qemu_aio_process_queue(void)
+{
+    AioHandler *node;
+    int ret = 0;
+
+    walking_handlers = 1;
+
+    QLIST_FOREACH(node, &aio_handlers, node) {
+        if (node->io_process_queue) {
+            if (node->io_process_queue(node->opaque)) {
+                ret = 1;
+            }
+        }
+    }
+
+    walking_handlers = 0;
+
+    return ret;
+}
+
 void qemu_aio_wait(void)
 {
     int ret;
@@ -122,6 +147,13 @@ void qemu_aio_wait(void)
     if (qemu_bh_poll())
         return;
 
+    /*
+     * If there are callbacks left that have been queued, we need to call then.
+     * Return afterwards to avoid waiting needlessly in select().
+     */
+    if (qemu_aio_process_queue())
+        return;
+
     do {
         AioHandler *node;
         fd_set rdfds, wrfds;
@@ -188,7 +220,7 @@ void qemu_aio_wait(void)
 
                 if (tmp->deleted) {
                     QLIST_REMOVE(tmp, node);
-                    qemu_free(tmp);
+                    g_free(tmp);
                 }
             }