Changeset a92da0a in mainline for uspace/srv/fs/tmpfs/tmpfs_ops.c

Timestamp:

2007-12-23T21:46:52Z (16 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

7dab6b8

Parents:

a55d5f9f

Message:

Reimplement VFS_READ using IPC_M_DATA_READ.

File:

• uspace/srv/fs/tmpfs/tmpfs_ops.c (modified) (3 diffs)

uspace/srv/fs/tmpfs/tmpfs_ops.c

@@ -283 +283 @@
         unsigned long index = IPC_GET_ARG2(*request);
         off_t pos = IPC_GET_ARG3(*request);
-        size_t size = IPC_GET_ARG4(*request);
 
         /*
@@ -298 +297 @@
 
         /*
-         * Receive the communication area.
+         * Receive the read request.
          */
         ipc_callid_t callid;
-        ipc_call_t call;
-        callid = async_get_call(&call);
-        if (IPC_GET_METHOD(call) != IPC_M_AS_AREA_SEND) {
+        size_t size;
+        if (!ipc_data_read_receive(&callid, size)) {
                 ipc_answer_0(callid, EINVAL);   
                 ipc_answer_0(rid, EINVAL);
@@ -309 +307 @@
         }
 
-        int flags = IPC_GET_ARG3(call);
-        if (!(flags & AS_AREA_WRITE)) {
-                ipc_answer_0(callid, EINVAL);
-                ipc_answer_0(rid, EINVAL);
-                return;
-        }
-        size_t sz = IPC_GET_ARG2(call);
-        uint8_t *buf = as_get_mappable_page(sz);
-        if (!buf) {
-                ipc_answer_0(callid, ENOMEM);
-                ipc_answer_0(rid, ENOMEM);
-                return;
-        }
-        ipc_answer_1(callid, EOK, buf);         /* commit to share the area */
-
         size_t bytes = max(0, min(dentry->size - pos, size));
-        memcpy(buf, dentry->data + pos, bytes);
-
-        (void) as_area_destroy(buf);
-
-        ipc_answer_1(rid, EOK, bytes);
+        (void) ipc_data_read_deliver(callid, dentry->data + pos, bytes);
 }