Allow the application to provide channel send/receive buffers.

[meshlink] / test / channels-buffer-storage.c

diff --git a/test/channels-buffer-storage.c b/test/channels-buffer-storage.c
new file mode 100644 (file)
index 0000000..af7b25b
--- /dev/null
+++ b/test/channels-buffer-storage.c
@@ -0,0 +1,165 @@
+#ifdef NDEBUG
+#undef NDEBUG
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <assert.h>
+
+#include "utils.h"
+#include "../src/meshlink.h"
+
+static struct sync_flag b_responded;
+static struct sync_flag aio_finished;
+
+static const size_t size = 25000000; // size of data to transfer
+
+static void a_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
+       (void)mesh;
+       (void)channel;
+
+       if(len == 5 && !memcmp(data, "Hello", 5)) {
+               set_sync_flag(&b_responded, true);
+       }
+}
+
+static void b_receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
+       assert(meshlink_channel_send(mesh, channel, data, len) == (ssize_t)len);
+}
+
+static bool reject_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
+       (void)mesh;
+       (void)channel;
+       (void)port;
+       (void)data;
+       (void)len;
+
+       return false;
+}
+
+static bool accept_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
+       printf("accept_cb: (from %s on port %u) ", channel->node->name, (unsigned int)port);
+
+       if(data) {
+               fwrite(data, 1, len, stdout);
+       }
+
+       printf("\n");
+
+       if(port != 7) {
+               return false;
+       }
+
+       meshlink_set_channel_receive_cb(mesh, channel, b_receive_cb);
+       meshlink_set_channel_sndbuf(mesh, channel, size);
+
+       if(data) {
+               b_receive_cb(mesh, channel, data, len);
+       }
+
+       return true;
+}
+
+static void poll_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, size_t len) {
+       (void)len;
+
+       meshlink_set_channel_poll_cb(mesh, channel, NULL);
+
+       assert(meshlink_channel_send(mesh, channel, "Hello", 5) == 5);
+}
+
+static void aio_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len, void *priv) {
+       (void)mesh;
+       (void)channel;
+       (void)data;
+       (void)len;
+       (void)priv;
+
+       set_sync_flag(&aio_finished, true);
+}
+
+int main(void) {
+       init_sync_flag(&b_responded);
+       init_sync_flag(&aio_finished);
+
+       meshlink_set_log_cb(NULL, MESHLINK_INFO, log_cb);
+
+       // Open two new meshlink instance.
+
+       meshlink_handle_t *mesh_a, *mesh_b;
+       open_meshlink_pair(&mesh_a, &mesh_b, "channels-buffer-storage");
+
+       // Set the callbacks.
+
+       meshlink_set_channel_accept_cb(mesh_a, reject_cb);
+       meshlink_set_channel_accept_cb(mesh_b, accept_cb);
+
+       // Start both instances
+
+       start_meshlink_pair(mesh_a, mesh_b);
+
+       // Open a channel from a to b.
+
+       meshlink_node_t *b = meshlink_get_node(mesh_a, "b");
+       assert(b);
+
+       meshlink_channel_t *channel = meshlink_channel_open(mesh_a, b, 7, a_receive_cb, NULL, 0);
+       assert(channel);
+
+       size_t buf_size = 1024 * 1024;
+       char *sndbuf = malloc(1024 * 1024);
+       assert(sndbuf);
+       char *rcvbuf = malloc(1024 * 1024);
+       assert(rcvbuf);
+
+       // Set external buffers
+
+       meshlink_set_channel_sndbuf_storage(mesh_a, channel, sndbuf, buf_size);
+       meshlink_set_channel_rcvbuf_storage(mesh_a, channel, rcvbuf, buf_size);
+
+       // Check that we can transition back and forth to external buffers
+
+       meshlink_set_channel_sndbuf_storage(mesh_a, channel, NULL, 4096);
+       meshlink_set_channel_rcvbuf(mesh_a, channel, 4096);
+
+       meshlink_set_channel_sndbuf_storage(mesh_a, channel, sndbuf, buf_size);
+       meshlink_set_channel_rcvbuf_storage(mesh_a, channel, rcvbuf, buf_size);
+
+       // Wait for the channel to finish connecting
+
+       meshlink_set_channel_poll_cb(mesh_a, channel, poll_cb);
+       assert(wait_sync_flag(&b_responded, 20));
+
+       // Send a lot of data
+
+       char *outdata = malloc(size);
+       assert(outdata);
+
+       for(size_t i = 0; i < size; i++) {
+               outdata[i] = i;
+       }
+
+       char *indata = malloc(size);
+       assert(indata);
+
+       assert(meshlink_channel_aio_receive(mesh_a, channel, indata, size, aio_cb, NULL));
+       assert(meshlink_channel_aio_send(mesh_a, channel, outdata, size, NULL, NULL));
+       assert(wait_sync_flag(&aio_finished, 20));
+       assert(!memcmp(indata, outdata, size));
+
+       // Done
+
+       meshlink_channel_close(mesh_a, channel);
+
+       // Clean up.
+
+       free(indata);
+       free(outdata);
+       free(rcvbuf);
+       free(sndbuf);
+
+       close_meshlink_pair(mesh_a, mesh_b);
+}