git.meshlink.io Git - meshlink/blob - test/channels-aio.c

   1 #include <assert.h>
   2 #include <stdio.h>
   3 #include <unistd.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <sys/time.h>
   7
   8 #include "meshlink.h"
   9 #include "utils.h"
  10
  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
  14
  15 struct aio_info {
  16         int callbacks;
  17         size_t size;
  18         struct timeval tv;
  19         struct sync_flag flag;
  20 };
  21
  22 struct channel_info {
  23         char *data;
  24         struct aio_info aio_infos[2];
  25 };
  26
  27 static size_t b_received_len;
  28 static struct timeval b_received_tv;
  29 static struct sync_flag b_received_flag;
  30
  31 static void aio_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len, void *priv) {
  32         (void)mesh;
  33         (void)channel;
  34         (void)data;
  35         (void)len;
  36
  37         struct aio_info *info = priv;
  38         gettimeofday(&info->tv, NULL);
  39         info->callbacks++;
  40         info->size += len;
  41         set_sync_flag(&info->flag, true);
  42 }
  43
  44 static bool reject_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
  45         (void)mesh;
  46         (void)channel;
  47         (void)port;
  48         (void)data;
  49         (void)len;
  50
  51         return false;
  52 }
  53
  54 static void receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
  55         (void)mesh;
  56         (void)channel;
  57         (void)data;
  58
  59         b_received_len += len;
  60
  61         if(b_received_len >= smallsize) {
  62                 gettimeofday(&b_received_tv, NULL);
  63                 set_sync_flag(&b_received_flag, true);
  64         }
  65 }
  66
  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);
  69         assert(!data);
  70         assert(!len);
  71
  72         if(port <= nchannels) {
  73                 struct channel_info *infos = mesh->priv;
  74                 struct channel_info *info = &infos[port - 1];
  75
  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]));
  78         } else {
  79                 meshlink_set_channel_receive_cb(mesh, channel, receive_cb);
  80         }
  81
  82         return true;
  83 }
  84
  85 int main(int argc, char *argv[]) {
  86         (void)argc;
  87         (void)argv;
  88
  89         meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_cb);
  90
  91         // Prepare data buffers
  92
  93         char *outdata = malloc(size);
  94         assert(outdata);
  95
  96         for(size_t i = 0; i < size; i++) {
  97                 outdata[i] = i;
  98         }
  99
 100         struct channel_info in_infos[nchannels];
 101
 102         struct channel_info out_infos[nchannels];
 103
 104         memset(in_infos, 0, sizeof(in_infos));
 105
 106         memset(out_infos, 0, sizeof(out_infos));
 107
 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;
 112         }
 113
 114         // Open two new meshlink instance.
 115
 116         meshlink_handle_t *mesh_a, *mesh_b;
 117         open_meshlink_pair(&mesh_a, &mesh_b, "channels_aio");
 118
 119         // Set the callbacks.
 120
 121         mesh_b->priv = in_infos;
 122
 123         meshlink_set_channel_accept_cb(mesh_a, reject_cb);
 124         meshlink_set_channel_accept_cb(mesh_b, accept_cb);
 125
 126         // Start both instances
 127
 128         start_meshlink_pair(mesh_a, mesh_b);
 129
 130         // Open channels from a to b.
 131
 132         meshlink_node_t *b = meshlink_get_node(mesh_a, "b");
 133         assert(b);
 134
 135         meshlink_channel_t *channels[nchannels + 1];
 136
 137         for(size_t i = 0; i < nchannels + 1; i++) {
 138                 channels[i] = meshlink_channel_open(mesh_a, b, i + 1, NULL, NULL, 0);
 139                 assert(channels[i]);
 140         }
 141
 142         // Send a large buffer of data on each channel.
 143
 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]));
 147         }
 148
 149         // Send a little bit on the last channel using a regular send
 150
 151         assert(meshlink_channel_send(mesh_a, channels[nchannels], outdata, smallsize) == (ssize_t)smallsize);
 152
 153         // Wait for everyone to finish.
 154
 155         assert(wait_sync_flag(&b_received_flag, 10));
 156
 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));
 162         }
 163
 164         // Check that everything is correct.
 165
 166         assert(b_received_len == smallsize);
 167
 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));
 171
 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);
 177
 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);
 183
 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, <=));
 188                 }
 189
 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, >=));
 193         }
 194
 195         // Clean up.
 196
 197         close_meshlink_pair(mesh_a, mesh_b);
 198 }