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

   1 #ifdef NDEBUG
   2 #undef NDEBUG
   3 #endif
   4
   5 #include <assert.h>
   6 #include <stdio.h>
   7 #include <unistd.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <sys/time.h>
  11
  12 #include "meshlink.h"
  13 #include "utils.h"
  14
  15 static const size_t size = 25000000; // size of data to transfer
  16 static const size_t smallsize = 100000; // size of the data to transfer without AIO
  17 static const size_t nchannels = 4; // number of simultaneous channels
  18
  19 struct aio_info {
  20         int callbacks;
  21         size_t size;
  22         struct timeval tv;
  23         struct sync_flag flag;
  24 };
  25
  26 struct channel_info {
  27         char *data;
  28         struct aio_info aio_infos[2];
  29 };
  30
  31 static size_t b_received_len;
  32 static struct timeval b_received_tv;
  33 static struct sync_flag b_received_flag;
  34
  35 static void aio_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len, void *priv) {
  36         (void)mesh;
  37         (void)channel;
  38         (void)data;
  39         (void)len;
  40
  41         struct aio_info *info = priv;
  42         gettimeofday(&info->tv, NULL);
  43         info->callbacks++;
  44         info->size += len;
  45         set_sync_flag(&info->flag, true);
  46 }
  47
  48 static bool reject_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
  49         (void)mesh;
  50         (void)channel;
  51         (void)port;
  52         (void)data;
  53         (void)len;
  54
  55         return false;
  56 }
  57
  58 static void receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
  59         (void)mesh;
  60         (void)channel;
  61         (void)data;
  62
  63         b_received_len += len;
  64
  65         if(b_received_len >= smallsize) {
  66                 gettimeofday(&b_received_tv, NULL);
  67                 set_sync_flag(&b_received_flag, true);
  68         }
  69 }
  70
  71 static bool accept_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
  72         assert(port && port <= nchannels + 1);
  73         assert(!data);
  74         assert(!len);
  75
  76         if(port <= nchannels) {
  77                 struct channel_info *infos = mesh->priv;
  78                 struct channel_info *info = &infos[port - 1];
  79
  80                 assert(meshlink_channel_aio_receive(mesh, channel, info->data, size / 4, aio_cb, &info->aio_infos[0]));
  81                 assert(meshlink_channel_aio_receive(mesh, channel, info->data + size / 4, size - size / 4, aio_cb, &info->aio_infos[1]));
  82         } else {
  83                 meshlink_set_channel_receive_cb(mesh, channel, receive_cb);
  84         }
  85
  86         return true;
  87 }
  88
  89 int main(int argc, char *argv[]) {
  90         (void)argc;
  91         (void)argv;
  92
  93         meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_cb);
  94
  95         // Prepare data buffers
  96
  97         char *outdata = malloc(size);
  98         assert(outdata);
  99
 100         for(size_t i = 0; i < size; i++) {
 101                 outdata[i] = i;
 102         }
 103
 104         struct channel_info in_infos[nchannels];
 105
 106         struct channel_info out_infos[nchannels];
 107
 108         memset(in_infos, 0, sizeof(in_infos));
 109
 110         memset(out_infos, 0, sizeof(out_infos));
 111
 112         for(size_t i = 0; i < nchannels; i++) {
 113                 in_infos[i].data = malloc(size);
 114                 assert(in_infos[i].data);
 115                 out_infos[i].data = outdata;
 116         }
 117
 118         // Open two new meshlink instance.
 119
 120         meshlink_handle_t *mesh_a, *mesh_b;
 121         open_meshlink_pair(&mesh_a, &mesh_b, "channels_aio");
 122
 123         // Set the callbacks.
 124
 125         mesh_b->priv = in_infos;
 126
 127         meshlink_set_channel_accept_cb(mesh_a, reject_cb);
 128         meshlink_set_channel_accept_cb(mesh_b, accept_cb);
 129
 130         // Start both instances
 131
 132         start_meshlink_pair(mesh_a, mesh_b);
 133
 134         // Open channels from a to b.
 135
 136         meshlink_node_t *b = meshlink_get_node(mesh_a, "b");
 137         assert(b);
 138
 139         meshlink_channel_t *channels[nchannels + 1];
 140
 141         for(size_t i = 0; i < nchannels + 1; i++) {
 142                 channels[i] = meshlink_channel_open(mesh_a, b, i + 1, NULL, NULL, 0);
 143                 assert(channels[i]);
 144         }
 145
 146         // Send a large buffer of data on each channel.
 147
 148         for(size_t i = 0; i < nchannels; i++) {
 149                 assert(meshlink_channel_aio_send(mesh_a, channels[i], outdata, size / 3, aio_cb, &out_infos[i].aio_infos[0]));
 150                 assert(meshlink_channel_aio_send(mesh_a, channels[i], outdata + size / 3, size - size / 3, aio_cb, &out_infos[i].aio_infos[1]));
 151         }
 152
 153         // Send a little bit on the last channel using a regular send
 154
 155         assert(meshlink_channel_send(mesh_a, channels[nchannels], outdata, smallsize) == (ssize_t)smallsize);
 156
 157         // Wait for everyone to finish.
 158
 159         assert(wait_sync_flag(&b_received_flag, 10));
 160
 161         for(size_t i = 0; i < nchannels; i++) {
 162                 assert(wait_sync_flag(&out_infos[i].aio_infos[0].flag, 10));
 163                 assert(wait_sync_flag(&out_infos[i].aio_infos[1].flag, 10));
 164                 assert(wait_sync_flag(&in_infos[i].aio_infos[0].flag, 10));
 165                 assert(wait_sync_flag(&in_infos[i].aio_infos[1].flag, 10));
 166         }
 167
 168         // Check that everything is correct.
 169
 170         assert(b_received_len == smallsize);
 171
 172         for(size_t i = 0; i < nchannels; i++) {
 173                 // Data should be transferred intact.
 174                 assert(!memcmp(in_infos[i].data, out_infos[i].data, size));
 175
 176                 // One callback for each AIO buffer.
 177                 assert(out_infos[i].aio_infos[0].callbacks == 1);
 178                 assert(out_infos[i].aio_infos[1].callbacks == 1);
 179                 assert(in_infos[i].aio_infos[0].callbacks == 1);
 180                 assert(in_infos[i].aio_infos[1].callbacks == 1);
 181
 182                 // Correct size sent and received.
 183                 assert(out_infos[i].aio_infos[0].size == size / 3);
 184                 assert(out_infos[i].aio_infos[1].size == size - size / 3);
 185                 assert(in_infos[i].aio_infos[0].size == size / 4);
 186                 assert(in_infos[i].aio_infos[1].size == size - size / 4);
 187
 188                 // First batch of data should all be sent and received before the second batch
 189                 for(size_t j = 0; j < nchannels; j++) {
 190                         assert(timercmp(&out_infos[i].aio_infos[0].tv, &out_infos[j].aio_infos[1].tv, <=));
 191                         assert(timercmp(&in_infos[i].aio_infos[0].tv, &in_infos[j].aio_infos[1].tv, <=));
 192                 }
 193
 194                 // The non-AIO transfer should have completed before everything else
 195                 assert(timercmp(&out_infos[i].aio_infos[0].tv, &b_received_tv, >=));
 196                 assert(timercmp(&in_infos[i].aio_infos[0].tv, &b_received_tv, >=));
 197         }
 198
 199         // Clean up.
 200
 201         close_meshlink_pair(mesh_a, mesh_b);
 202 }