11 static const size_t size = 25000000; // size of data to transfer
12 static const size_t smallsize = 100000; // size of the data to transfer without AIO
13 static const size_t nchannels = 4; // number of simultaneous channels
19 struct sync_flag flag;
24 struct aio_info aio_infos[2];
27 static size_t b_received_len;
28 static struct timeval b_received_tv;
29 static struct sync_flag b_received_flag;
31 static void aio_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len, void *priv) {
37 struct aio_info *info = priv;
38 gettimeofday(&info->tv, NULL);
41 set_sync_flag(&info->flag, true);
44 static bool reject_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
54 static void receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
59 b_received_len += len;
61 if(b_received_len >= smallsize) {
62 gettimeofday(&b_received_tv, NULL);
63 set_sync_flag(&b_received_flag, true);
67 static bool accept_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
68 assert(port && port <= nchannels + 1);
72 if(port <= nchannels) {
73 struct channel_info *infos = mesh->priv;
74 struct channel_info *info = &infos[port - 1];
76 assert(meshlink_channel_aio_receive(mesh, channel, info->data, size / 4, aio_cb, &info->aio_infos[0]));
77 assert(meshlink_channel_aio_receive(mesh, channel, info->data + size / 4, size - size / 4, aio_cb, &info->aio_infos[1]));
79 meshlink_set_channel_receive_cb(mesh, channel, receive_cb);
85 int main(int argc, char *argv[]) {
89 meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_cb);
91 // Prepare data buffers
93 char *outdata = malloc(size);
96 for(size_t i = 0; i < size; i++) {
100 struct channel_info in_infos[nchannels];
102 struct channel_info out_infos[nchannels];
104 memset(in_infos, 0, sizeof(in_infos));
106 memset(out_infos, 0, sizeof(out_infos));
108 for(size_t i = 0; i < nchannels; i++) {
109 in_infos[i].data = malloc(size);
110 assert(in_infos[i].data);
111 out_infos[i].data = outdata;
114 // Open two new meshlink instance.
116 meshlink_handle_t *mesh_a, *mesh_b;
117 open_meshlink_pair(&mesh_a, &mesh_b, "channels_aio");
119 // Set the callbacks.
121 mesh_b->priv = in_infos;
123 meshlink_set_channel_accept_cb(mesh_a, reject_cb);
124 meshlink_set_channel_accept_cb(mesh_b, accept_cb);
126 // Start both instances
128 start_meshlink_pair(mesh_a, mesh_b);
130 // Open channels from a to b.
132 meshlink_node_t *b = meshlink_get_node(mesh_a, "b");
135 meshlink_channel_t *channels[nchannels + 1];
137 for(size_t i = 0; i < nchannels + 1; i++) {
138 channels[i] = meshlink_channel_open(mesh_a, b, i + 1, NULL, NULL, 0);
142 // Send a large buffer of data on each channel.
144 for(size_t i = 0; i < nchannels; i++) {
145 assert(meshlink_channel_aio_send(mesh_a, channels[i], outdata, size / 3, aio_cb, &out_infos[i].aio_infos[0]));
146 assert(meshlink_channel_aio_send(mesh_a, channels[i], outdata + size / 3, size - size / 3, aio_cb, &out_infos[i].aio_infos[1]));
149 // Send a little bit on the last channel using a regular send
151 assert(meshlink_channel_send(mesh_a, channels[nchannels], outdata, smallsize) == (ssize_t)smallsize);
153 // Wait for everyone to finish.
155 assert(wait_sync_flag(&b_received_flag, 10));
157 for(size_t i = 0; i < nchannels; i++) {
158 assert(wait_sync_flag(&out_infos[i].aio_infos[0].flag, 10));
159 assert(wait_sync_flag(&out_infos[i].aio_infos[1].flag, 10));
160 assert(wait_sync_flag(&in_infos[i].aio_infos[0].flag, 10));
161 assert(wait_sync_flag(&in_infos[i].aio_infos[1].flag, 10));
164 // Check that everything is correct.
166 assert(b_received_len == smallsize);
168 for(size_t i = 0; i < nchannels; i++) {
169 // Data should be transferred intact.
170 assert(!memcmp(in_infos[i].data, out_infos[i].data, size));
172 // One callback for each AIO buffer.
173 assert(out_infos[i].aio_infos[0].callbacks == 1);
174 assert(out_infos[i].aio_infos[1].callbacks == 1);
175 assert(in_infos[i].aio_infos[0].callbacks == 1);
176 assert(in_infos[i].aio_infos[1].callbacks == 1);
178 // Correct size sent and received.
179 assert(out_infos[i].aio_infos[0].size == size / 3);
180 assert(out_infos[i].aio_infos[1].size == size - size / 3);
181 assert(in_infos[i].aio_infos[0].size == size / 4);
182 assert(in_infos[i].aio_infos[1].size == size - size / 4);
184 // First batch of data should all be sent and received before the second batch
185 for(size_t j = 0; j < nchannels; j++) {
186 assert(timercmp(&out_infos[i].aio_infos[0].tv, &out_infos[j].aio_infos[1].tv, <=));
187 assert(timercmp(&in_infos[i].aio_infos[0].tv, &in_infos[j].aio_infos[1].tv, <=));
190 // The non-AIO transfer should have completed before everything else
191 assert(timercmp(&out_infos[i].aio_infos[0].tv, &b_received_tv, >=));
192 assert(timercmp(&in_infos[i].aio_infos[0].tv, &b_received_tv, >=));
197 close_meshlink_pair(mesh_a, mesh_b);