Changeset 3b3e776 in mainline for uspace/lib/libc/generic/async.c

Timestamp:

2010-02-05T10:57:50Z (15 years ago)

Author:

Lenka Trochtova <trochtova.lenka@…>

Branches:

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

Children:

0358da0

Parents:

3f085132 (diff), b4cbef1 (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:

merged with head

File:

• uspace/lib/libc/generic/async.c (modified) (7 diffs)

uspace/lib/libc/generic/async.c

@@ -392 +392 @@
         /* If nothing in queue, wait until something arrives */
         while (list_empty(&conn->msg_queue)) {
+                if (conn->close_callid) {
+                        /*
+                         * Handle the case when the connection was already
+                         * closed by the client but the server did not notice
+                         * the first IPC_M_PHONE_HUNGUP call and continues to
+                         * call async_get_call_timeout(). Repeat
+                         * IPC_M_PHONE_HUNGUP until the caller notices. 
+                         */
+                        memset(call, 0, sizeof(ipc_call_t));
+                        IPC_SET_METHOD(*call, IPC_M_PHONE_HUNGUP);
+                        futex_up(&async_futex);
+                        return conn->close_callid;
+                }
+
                 if (usecs)
                         async_insert_timeout(&conn->wdata);
@@ -528 +542 @@
         list_initialize(&conn->msg_queue);
         conn->callid = callid;
-        conn->close_callid = false;
+        conn->close_callid = 0;
         
         if (call)
@@ -1273 +1287 @@
 }
 
+/** Wrapper for forwarding any read request
+ *
+ *
+ */
+int async_data_read_forward_fast(int phoneid, ipcarg_t method, ipcarg_t arg1,
+    ipcarg_t arg2, ipcarg_t arg3, ipcarg_t arg4, ipc_call_t *dataptr)
+{
+        ipc_callid_t callid;
+        if (!async_data_read_receive(&callid, NULL)) {
+                ipc_answer_0(callid, EINVAL);
+                return EINVAL;
+        }
+        
+        aid_t msg = async_send_fast(phoneid, method, arg1, arg2, arg3, arg4,
+            dataptr);
+        if (msg == 0) {
+                ipc_answer_0(callid, EINVAL);
+                return EINVAL;
+        }
+        
+        int retval = ipc_forward_fast(callid, phoneid, 0, 0, 0,
+            IPC_FF_ROUTE_FROM_ME);
+        if (retval != EOK) {
+                ipc_answer_0(callid, retval);
+                return retval;
+        }
+        
+        ipcarg_t rc;
+        async_wait_for(msg, &rc);
+        
+        return (int) rc;
+}
+
 /** Wrapper for making IPC_M_DATA_WRITE calls using the async framework.
  *
- * @param phoneid       Phone that will be used to contact the receiving side.
- * @param src           Address of the beginning of the source buffer.
- * @param size          Size of the source buffer.
- *
- * @return              Zero on success or a negative error code from errno.h.
+ * @param phoneid Phone that will be used to contact the receiving side.
+ * @param src     Address of the beginning of the source buffer.
+ * @param size    Size of the source buffer.
+ *
+ * @return Zero on success or a negative error code from errno.h.
+ *
  */
 int async_data_write_start(int phoneid, const void *src, size_t size)
@@ -1294 +1342 @@
  * So far, this wrapper is to be used from within a connection fibril.
  *
- * @param callid        Storage where the hash of the IPC_M_DATA_WRITE call will
- *                      be stored.
- * @param size          Storage where the suggested size will be stored. May be
- *                      NULL
- *
- * @return              Non-zero on success, zero on failure.
+ * @param callid Storage where the hash of the IPC_M_DATA_WRITE call will
+ *               be stored.
+ * @param size   Storage where the suggested size will be stored. May be
+ *               NULL
+ *
+ * @return Non-zero on success, zero on failure.
+ *
  */
 int async_data_write_receive(ipc_callid_t *callid, size_t *size)
@@ -1306 +1355 @@
         
         assert(callid);
-
+        
         *callid = async_get_call(&data);
         if (IPC_GET_METHOD(data) != IPC_M_DATA_WRITE)
                 return 0;
+        
         if (size)
                 *size = (size_t) IPC_GET_ARG2(data);
+        
         return 1;
 }
@@ -1320 +1371 @@
  * so that the user doesn't have to remember the meaning of each IPC argument.
  *
- * @param callid        Hash of the IPC_M_DATA_WRITE call to answer.
- * @param dst           Final destination address for the IPC_M_DATA_WRITE call.
- * @param size          Final size for the IPC_M_DATA_WRITE call.
- *
- * @return              Zero on success or a value from @ref errno.h on failure.
+ * @param callid Hash of the IPC_M_DATA_WRITE call to answer.
+ * @param dst    Final destination address for the IPC_M_DATA_WRITE call.
+ * @param size   Final size for the IPC_M_DATA_WRITE call.
+ *
+ * @return Zero on success or a value from @ref errno.h on failure.
+ *
  */
 int async_data_write_finalize(ipc_callid_t callid, void *dst, size_t size)
@@ -1331 +1383 @@
 }
 
+/** Wrapper for receiving binary data
+ *
+ * This wrapper only makes it more comfortable to use async_data_write_*
+ * functions to receive binary data.
+ *
+ * @param data       Pointer to data pointer (which should be later disposed
+ *                   by free()). If the operation fails, the pointer is not
+ *                   touched.
+ * @param min_size   Minimum size (in bytes) of the data to receive.
+ * @param max_size   Maximum size (in bytes) of the data to receive. 0 means
+ *                   no limit.
+ * @param granulariy If non-zero, then the size of the received data has to
+ *                   be divisible by this value.
+ * @param received   If not NULL, the size of the received data is stored here.
+ *
+ * @return Zero on success or a value from @ref errno.h on failure.
+ *
+ */
+int async_data_receive(void **data, const size_t min_size,
+    const size_t max_size, const size_t granularity, size_t *received)
+{
+        ipc_callid_t callid;
+        size_t size;
+        if (!async_data_write_receive(&callid, &size)) {
+                ipc_answer_0(callid, EINVAL);
+                return EINVAL;
+        }
+        
+        if (size < min_size) {
+                ipc_answer_0(callid, EINVAL);
+                return EINVAL;
+        }
+        
+        if ((max_size > 0) && (size > max_size)) {
+                ipc_answer_0(callid, EINVAL);
+                return EINVAL;
+        }
+        
+        if ((granularity > 0) && ((size % granularity) != 0)) {
+                ipc_answer_0(callid, EINVAL);
+                return EINVAL;
+        }
+        
+        void *_data = malloc(size);
+        if (_data == NULL) {
+                ipc_answer_0(callid, ENOMEM);
+                return ENOMEM;
+        }
+        
+        int rc = async_data_write_finalize(callid, _data, size);
+        if (rc != EOK) {
+                free(_data);
+                return rc;
+        }
+        
+        *data = _data;
+        if (received != NULL)
+                *received = size;
+        
+        return EOK;
+}
+
+/** Wrapper for receiving strings
+ *
+ * This wrapper only makes it more comfortable to use async_data_write_*
+ * functions to receive strings.
+ *
+ * @param str      Pointer to string pointer (which should be later disposed
+ *                 by free()). If the operation fails, the pointer is not
+ *                 touched.
+ * @param max_size Maximum size (in bytes) of the string to receive. 0 means
+ *                 no limit.
+ * @param received If not NULL, the size of the received data is stored here.
+ *
+ * @return Zero on success or a value from @ref errno.h on failure.
+ *
+ */
+int async_string_receive(char **str, const size_t max_size, size_t *received)
+{
+        ipc_callid_t callid;
+        size_t size;
+        if (!async_data_write_receive(&callid, &size)) {
+                ipc_answer_0(callid, EINVAL);
+                return EINVAL;
+        }
+        
+        if ((max_size > 0) && (size > max_size)) {
+                ipc_answer_0(callid, EINVAL);
+                return EINVAL;
+        }
+        
+        char *data = (char *) malloc(size + 1);
+        if (data == NULL) {
+                ipc_answer_0(callid, ENOMEM);
+                return ENOMEM;
+        }
+        
+        int rc = async_data_write_finalize(callid, data, size);
+        if (rc != EOK) {
+                free(data);
+                return rc;
+        }
+        
+        data[size] = 0;
+        *str = data;
+        if (received != NULL)
+                *received = size;
+        
+        return EOK;
+}
+
+/** Wrapper for voiding any data that is about to be received
+ *
+ * This wrapper can be used to void any pending data
+ *
+ * @param retval Error value from @ref errno.h to be returned to the caller.
+ *
+ */
+void async_data_void(const int retval)
+{
+        ipc_callid_t callid;
+        async_data_write_receive(&callid, NULL);
+        ipc_answer_0(callid, retval);
+}
+
+/** Wrapper for forwarding any data that is about to be received
+ *
+ *
+ */
+int async_data_forward_fast(int phoneid, ipcarg_t method, ipcarg_t arg1,
+    ipcarg_t arg2, ipcarg_t arg3, ipcarg_t arg4, ipc_call_t *dataptr)
+{
+        ipc_callid_t callid;
+        if (!async_data_write_receive(&callid, NULL)) {
+                ipc_answer_0(callid, EINVAL);
+                return EINVAL;
+        }
+        
+        aid_t msg = async_send_fast(phoneid, method, arg1, arg2, arg3, arg4,
+            dataptr);
+        if (msg == 0) {
+                ipc_answer_0(callid, EINVAL);
+                return EINVAL;
+        }
+        
+        int retval = ipc_forward_fast(callid, phoneid, 0, 0, 0,
+            IPC_FF_ROUTE_FROM_ME);
+        if (retval != EOK) {
+                ipc_answer_0(callid, retval);
+                return retval;
+        }
+        
+        ipcarg_t rc;
+        async_wait_for(msg, &rc);
+        
+        return (int) rc;
+}
+
 /** @}
  */