12 static const size_t size = 1024 * 1024; // size of data to transfer
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 void aio_fd_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, int fd, size_t len, void *priv) {
33 struct aio_info *info = priv;
34 gettimeofday(&info->tv, NULL);
37 set_sync_flag(&info->flag, true);
40 static bool reject_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
50 static bool accept_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
51 assert(port && port <= nchannels);
55 struct channel_info *infos = mesh->priv;
56 struct channel_info *info = &infos[port - 1];
58 assert(meshlink_channel_aio_fd_receive(mesh, channel, fileno(info->file), size / 4, aio_fd_cb, &info->aio_infos[0]));
59 assert(meshlink_channel_aio_fd_receive(mesh, channel, fileno(info->file), size - size / 4, aio_fd_cb, &info->aio_infos[1]));
64 int main(int argc, char *argv[]) {
68 meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_cb);
72 char *outdata = malloc(size);
75 for(size_t i = 0; i < size; i++) {
76 // Human readable output
77 outdata[i] = i % 96 ? i % 96 + 32 : '\n';
80 FILE *file = fopen("channels_aio_fd.in", "w");
82 assert(fwrite(outdata, size, 1, file) == 1);
83 assert(fclose(file) == 0);
85 struct channel_info in_infos[nchannels];
86 struct channel_info out_infos[nchannels];
88 memset(in_infos, 0, sizeof(in_infos));
89 memset(out_infos, 0, sizeof(out_infos));
91 for(size_t i = 0; i < nchannels; i++) {
92 char filename[PATH_MAX];
93 snprintf(filename, sizeof(filename), "channels_aio_fd.out%d", (int)i);
94 in_infos[i].file = fopen(filename, "w");
95 assert(in_infos[i].file);
96 out_infos[i].file = fopen("channels_aio_fd.in", "r");
97 assert(out_infos[i].file);
100 // Open two new meshlink instance.
102 meshlink_handle_t *mesh_a, *mesh_b;
103 open_meshlink_pair(&mesh_a, &mesh_b, "channels_aio_fd");
105 mesh_b->priv = in_infos;
107 meshlink_enable_discovery(mesh_a, false);
108 meshlink_enable_discovery(mesh_b, false);
110 // Set the callbacks.
112 meshlink_set_channel_accept_cb(mesh_a, reject_cb);
113 meshlink_set_channel_accept_cb(mesh_b, accept_cb);
115 // Start both instances
117 start_meshlink_pair(mesh_a, mesh_b);
119 // Open channels from a to b.
121 meshlink_node_t *b = meshlink_get_node(mesh_a, "b");
124 meshlink_channel_t *channels[nchannels];
126 for(size_t i = 0; i < nchannels; i++) {
127 channels[i] = meshlink_channel_open(mesh_a, b, i + 1, NULL, NULL, 0);
131 // Send a large buffer of data on each channel.
133 for(size_t i = 0; i < nchannels; i++) {
134 assert(meshlink_channel_aio_fd_send(mesh_a, channels[i], fileno(out_infos[i].file), size / 3, aio_fd_cb, &out_infos[i].aio_infos[0]));
135 assert(meshlink_channel_aio_fd_send(mesh_a, channels[i], fileno(out_infos[i].file), size - size / 3, aio_fd_cb, &out_infos[i].aio_infos[1]));
138 // Wait for everyone to finish.
140 for(size_t i = 0; i < nchannels; i++) {
141 assert(wait_sync_flag(&out_infos[i].aio_infos[0].flag, 10));
142 assert(wait_sync_flag(&out_infos[i].aio_infos[1].flag, 10));
143 assert(wait_sync_flag(&in_infos[i].aio_infos[0].flag, 10));
144 assert(wait_sync_flag(&in_infos[i].aio_infos[1].flag, 10));
147 // Check that everything is correct.
149 for(size_t i = 0; i < nchannels; i++) {
150 assert(fclose(in_infos[i].file) == 0);
151 assert(fclose(out_infos[i].file) == 0);
153 // One callback for each AIO buffer.
154 assert(out_infos[i].aio_infos[0].callbacks == 1);
155 assert(out_infos[i].aio_infos[1].callbacks == 1);
156 assert(in_infos[i].aio_infos[0].callbacks == 1);
157 assert(in_infos[i].aio_infos[1].callbacks == 1);
159 // Correct size sent and received.
160 assert(out_infos[i].aio_infos[0].size == size / 3);
161 assert(out_infos[i].aio_infos[1].size == size - size / 3);
162 assert(in_infos[i].aio_infos[0].size == size / 4);
163 assert(in_infos[i].aio_infos[1].size == size - size / 4);
165 // First batch of data should all be sent and received before the second batch
166 for(size_t j = 0; j < nchannels; j++) {
167 assert(timercmp(&out_infos[i].aio_infos[0].tv, &out_infos[j].aio_infos[1].tv, <=));
168 assert(timercmp(&in_infos[i].aio_infos[0].tv, &in_infos[j].aio_infos[1].tv, <=));
171 // Files should be identical
172 char command[PATH_MAX];
173 snprintf(command, sizeof(command), "cmp channels_aio_fd.in channels_aio_fd.out%d", (int)i);
174 assert(system(command) == 0);
180 close_meshlink_pair(mesh_a, mesh_b);