Changeset 7fcb74c in mainline for uspace/lib/libc/generic/devmap.c

Timestamp:

2009-06-29T16:02:32Z (15 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

f49cf64

Parents:

bfd247f

Message:

add support for creating null devices on demand

File:

• uspace/lib/libc/generic/devmap.c (modified) (1 diff)

uspace/lib/libc/generic/devmap.c

@@ -219 +219 @@
 }
 
+int devmap_null_create(void)
+{
+        int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
+        
+        if (phone < 0)
+                return -1;
+        
+        ipcarg_t null_id;
+        int retval = async_req_0_1(phone, DEVMAP_DEVICE_NULL_CREATE, &null_id);
+        if (retval != EOK)
+                return -1;
+        
+        return (int) null_id;
+}
+
+void devmap_null_destroy(int null_id)
+{
+        int phone = devmap_get_phone(DEVMAP_CLIENT, IPC_FLAG_BLOCKING);
+        
+        if (phone < 0)
+                return;
+        
+        async_req_1_0(phone, DEVMAP_DEVICE_NULL_DESTROY, (ipcarg_t) null_id);
+}
+
 ipcarg_t devmap_device_get_count(void)
 {