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 <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 timespec ts;
  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 timespec b_received_ts;
  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         clock_gettime(CLOCK_MONOTONIC, &info->ts);
  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                 clock_gettime(CLOCK_MONOTONIC, &b_received_ts);
  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(void) {
  90         init_sync_flag(&b_received_flag);
  91
  92         meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_cb);
  93
  94         // Prepare data buffers
  95
  96         char *outdata = malloc(size);
  97         assert(outdata);
  98
  99         for(size_t i = 0; i < size; i++) {
 100                 outdata[i] = i;
 101         }
 102
 103         struct channel_info in_infos[nchannels];
 104
 105         struct channel_info out_infos[nchannels];
 106
 107         memset(in_infos, 0, sizeof(in_infos));
 108
 109         memset(out_infos, 0, sizeof(out_infos));
 110
 111         for(size_t i = 0; i < nchannels; i++) {
 112                 init_sync_flag(&in_infos[i].aio_infos[0].flag);
 113                 init_sync_flag(&in_infos[i].aio_infos[1].flag);
 114                 init_sync_flag(&out_infos[i].aio_infos[0].flag);
 115                 init_sync_flag(&out_infos[i].aio_infos[1].flag);
 116
 117                 in_infos[i].data = malloc(size);
 118                 assert(in_infos[i].data);
 119                 out_infos[i].data = outdata;
 120         }
 121
 122         // Open two new meshlink instance.
 123
 124         meshlink_handle_t *mesh_a, *mesh_b;
 125         open_meshlink_pair(&mesh_a, &mesh_b, "channels_aio");
 126
 127         // Set the callbacks.
 128
 129         mesh_b->priv = in_infos;
 130
 131         meshlink_set_channel_accept_cb(mesh_a, reject_cb);
 132         meshlink_set_channel_accept_cb(mesh_b, accept_cb);
 133
 134         // Start both instances
 135
 136         start_meshlink_pair(mesh_a, mesh_b);
 137
 138         // Open channels from a to b.
 139
 140         meshlink_node_t *b = meshlink_get_node(mesh_a, "b");
 141         assert(b);
 142
 143         meshlink_channel_t *channels[nchannels + 1];
 144
 145         for(size_t i = 0; i < nchannels + 1; i++) {
 146                 channels[i] = meshlink_channel_open(mesh_a, b, i + 1, NULL, NULL, 0);
 147                 assert(channels[i]);
 148         }
 149
 150         // Send a large buffer of data on each channel.
 151
 152         for(size_t i = 0; i < nchannels; i++) {
 153                 assert(meshlink_channel_aio_send(mesh_a, channels[i], outdata, size / 3, aio_cb, &out_infos[i].aio_infos[0]));
 154                 assert(meshlink_channel_aio_send(mesh_a, channels[i], outdata + size / 3, size - size / 3, aio_cb, &out_infos[i].aio_infos[1]));
 155         }
 156
 157         // Send a little bit on the last channel using a regular send
 158
 159         assert(meshlink_channel_send(mesh_a, channels[nchannels], outdata, smallsize) == (ssize_t)smallsize);
 160
 161         // Wait for everyone to finish.
 162
 163         assert(wait_sync_flag(&b_received_flag, 10));
 164
 165         for(size_t i = 0; i < nchannels; i++) {
 166                 assert(wait_sync_flag(&out_infos[i].aio_infos[0].flag, 10));
 167                 assert(wait_sync_flag(&out_infos[i].aio_infos[1].flag, 10));
 168                 assert(wait_sync_flag(&in_infos[i].aio_infos[0].flag, 10));
 169                 assert(wait_sync_flag(&in_infos[i].aio_infos[1].flag, 10));
 170         }
 171
 172         // Check that everything is correct.
 173
 174         assert(b_received_len == smallsize);
 175
 176         for(size_t i = 0; i < nchannels; i++) {
 177                 // Data should be transferred intact.
 178                 assert(!memcmp(in_infos[i].data, out_infos[i].data, size));
 179
 180                 // One callback for each AIO buffer.
 181                 assert(out_infos[i].aio_infos[0].callbacks == 1);
 182                 assert(out_infos[i].aio_infos[1].callbacks == 1);
 183                 assert(in_infos[i].aio_infos[0].callbacks == 1);
 184                 assert(in_infos[i].aio_infos[1].callbacks == 1);
 185
 186                 // Correct size sent and received.
 187                 assert(out_infos[i].aio_infos[0].size == size / 3);
 188                 assert(out_infos[i].aio_infos[1].size == size - size / 3);
 189                 assert(in_infos[i].aio_infos[0].size == size / 4);
 190                 assert(in_infos[i].aio_infos[1].size == size - size / 4);
 191
 192                 // First batch of data should all be sent and received before the second batch
 193                 for(size_t j = 0; j < nchannels; j++) {
 194                         assert(timespec_lt(&out_infos[i].aio_infos[0].ts, &out_infos[j].aio_infos[1].ts));
 195                         assert(timespec_lt(&in_infos[i].aio_infos[0].ts, &in_infos[j].aio_infos[1].ts));
 196                 }
 197
 198                 // The non-AIO transfer should have completed before everything else
 199                 assert(!timespec_lt(&out_infos[i].aio_infos[0].ts, &b_received_ts));
 200                 assert(!timespec_lt(&in_infos[i].aio_infos[0].ts, &b_received_ts));
 201         }
 202
 203         // Clean up.
 204
 205         close_meshlink_pair(mesh_a, mesh_b);
 206 }