Changeset a55d5f9f in mainline for uspace

Timestamp:

2007-12-23T21:21:41Z (17 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

a92da0a

Parents:

654b7db

Message:

Add support for IPC_M_DATA_READ calls.

Location:

uspace/lib/libc

Files:

• generic/ipc.c (modified) (2 diffs)
• include/ipc/ipc.h (modified) (1 diff)

uspace/lib/libc/generic/ipc.c

@@ -667 +667 @@
 }
 
+/** Wrapper for making IPC_M_DATA_READ calls.
+ *
+ * @param phoneid       Phone that will be used to contact the receiving side.
+ * @param dst           Address of the beginning of the destination buffer.
+ * @param size          Size of the destination buffer.
+ *
+ * @return              Zero on success or a negative error code from errno.h.
+ */
+int ipc_data_read_send(int phoneid, void *dst, size_t size)
+{
+        return ipc_call_sync_2_0(phoneid, IPC_M_DATA_READ, (ipcarg_t) dst,
+            (ipcarg_t) size);
+}
+
+/** Wrapper for receiving the IPC_M_DATA_READ calls.
+ *
+ * This wrapper only makes it more comfortable to receive IPC_M_DATA_READ calls
+ * so that the user doesn't have to remember the meaning of each IPC argument.
+ *
+ * So far, this wrapper is to be used from within a connection fibril.
+ *
+ * @param callid        Storage where the hash of the IPC_M_DATA_READ call will
+ *                      be stored.
+ * @param size          Storage where the maximum size will be stored.
+ *
+ * @return              Non-zero on success, zero on failure.
+ */
+int ipc_data_read_receive(ipc_callid_t *callid, size_t *size)
+{
+        ipc_call_t data;
+        
+        assert(callid);
+
+        *callid = async_get_call(&data);
+        if (IPC_GET_METHOD(data) != IPC_M_DATA_READ)
+                return 0;
+        assert(size);
+        *size = (size_t) IPC_GET_ARG2(data);
+        return 1;
+}
+
+/** Wrapper for answering the IPC_M_DATA_READ calls.
+ *
+ * This wrapper only makes it more comfortable to answer IPC_M_DATA_READ calls
+ * so that the user doesn't have to remember the meaning of each IPC argument.
+ *
+ * @param callid        Hash of the IPC_M_DATA_READ call to answer.
+ * @param src           Source address for the IPC_M_DATA_READ call.
+ * @param size          Size for the IPC_M_DATA_READ call. Can be smaller than
+ *                      the maximum size announced by the sender.
+ *
+ * @return              Zero on success or a value from @ref errno.h on failure.
+ */
+int ipc_data_read_deliver(ipc_callid_t callid, void *src, size_t size)
+{
+        return ipc_answer_2(callid, EOK, (ipcarg_t) src, (ipcarg_t) size);
+}
+
 /** Wrapper for making IPC_M_DATA_WRITE calls.
  *
@@ -724 +782 @@
  * @return              Zero on success or a value from @ref errno.h on failure.
  */
-ipcarg_t ipc_data_write_deliver(ipc_callid_t callid, void *dst, size_t size)
+int ipc_data_write_deliver(ipc_callid_t callid, void *dst, size_t size)
 {
         return ipc_answer_3(callid, EOK, (ipcarg_t) dst, 0, (ipcarg_t) size);

uspace/lib/libc/include/ipc/ipc.h

@@ -261 +261 @@
 extern int ipc_forward_fast(ipc_callid_t callid, int phoneid, int method,
     ipcarg_t arg1, ipcarg_t arg2, int mode);
+
+
+extern int ipc_data_read_send(int phoneid, void *dst, size_t size);
+extern int ipc_data_read_receive(ipc_callid_t *callid, size_t *size);
+extern int ipc_data_read_deliver(ipc_callid_t callid, void *src, size_t size);
 extern int ipc_data_write_send(int phoneid, void *src, size_t size);
 extern int ipc_data_write_receive(ipc_callid_t *callid, void **dst,
     size_t *size);
-extern ipcarg_t ipc_data_write_deliver(ipc_callid_t callid, void *dst,
-    size_t size);
+extern int ipc_data_write_deliver(ipc_callid_t callid, void *dst, size_t size);
 
 #endif