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

   1 #ifdef NDEBUG
   2 #undef NDEBUG
   3 #endif
   4
   5 #define _POSIX_C_SOURCE 200809L
   6
   7 #include <assert.h>
   8 #include <stdio.h>
   9 #include <unistd.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <time.h>
  13
  14 #include "meshlink.h"
  15 #include "utils.h"
  16
  17 static const size_t size = 25000000; // size of data to transfer
  18 static const size_t smallsize = 100000; // size of the data to transfer without AIO
  19 static const size_t nchannels = 4; // number of simultaneous channels
  20
  21 struct aio_info {
  22         int callbacks;
  23         size_t size;
  24         struct timespec ts;
  25         struct sync_flag flag;
  26 };
  27
  28 struct channel_info {
  29         char *data;
  30         struct aio_info aio_infos[2];
  31 };
  32
  33 static size_t b_received_len;
  34 static struct timespec b_received_ts;
  35 static struct sync_flag b_received_flag;
  36
  37 static void aio_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len, void *priv) {
  38         (void)mesh;
  39         (void)channel;
  40         (void)data;
  41         (void)len;
  42
  43         struct aio_info *info = priv;
  44         clock_gettime(CLOCK_MONOTONIC, &info->ts);
  45         info->callbacks++;
  46         info->size += len;
  47         set_sync_flag(&info->flag, true);
  48 }
  49
  50 static void receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
  51         (void)mesh;
  52         (void)channel;
  53         (void)data;
  54
  55         b_received_len += len;
  56
  57         if(b_received_len >= smallsize) {
  58                 clock_gettime(CLOCK_MONOTONIC, &b_received_ts);
  59                 set_sync_flag(&b_received_flag, true);
  60         }
  61 }
  62
  63 static bool accept_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
  64         assert(port && port <= nchannels + 1);
  65         assert(!data);
  66         assert(!len);
  67
  68         if(port <= nchannels) {
  69                 struct channel_info *infos = mesh->priv;
  70                 struct channel_info *info = &infos[port - 1];
  71
  72                 assert(meshlink_channel_aio_receive(mesh, channel, info->data, size / 4, aio_cb, &info->aio_infos[0]));
  73                 assert(meshlink_channel_aio_receive(mesh, channel, info->data + size / 4, size - size / 4, aio_cb, &info->aio_infos[1]));
  74         } else {
  75                 meshlink_set_channel_receive_cb(mesh, channel, receive_cb);
  76         }
  77
  78         return true;
  79 }
  80
  81 int main(void) {
  82         init_sync_flag(&b_received_flag);
  83
  84         meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_cb);
  85
  86         // Prepare data buffers
  87
  88         char *outdata = malloc(size);
  89         assert(outdata);
  90
  91         for(size_t i = 0; i < size; i++) {
  92                 outdata[i] = i;
  93         }
  94
  95         struct channel_info in_infos[nchannels];
  96
  97         struct channel_info out_infos[nchannels];
  98
  99         memset(in_infos, 0, sizeof(in_infos));
 100
 101         memset(out_infos, 0, sizeof(out_infos));
 102
 103         for(size_t i = 0; i < nchannels; i++) {
 104                 init_sync_flag(&in_infos[i].aio_infos[0].flag);
 105                 init_sync_flag(&in_infos[i].aio_infos[1].flag);
 106                 init_sync_flag(&out_infos[i].aio_infos[0].flag);
 107                 init_sync_flag(&out_infos[i].aio_infos[1].flag);
 108
 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_b, accept_cb);
 124
 125         // Start both instances
 126
 127         start_meshlink_pair(mesh_a, mesh_b);
 128
 129         // Open channels from a to b.
 130
 131         meshlink_node_t *b = meshlink_get_node(mesh_a, "b");
 132         assert(b);
 133
 134         meshlink_channel_t *channels[nchannels + 1];
 135
 136         for(size_t i = 0; i < nchannels + 1; i++) {
 137                 channels[i] = meshlink_channel_open(mesh_a, b, i + 1, NULL, NULL, 0);
 138                 assert(channels[i]);
 139         }
 140
 141         // Send a large buffer of data on each channel.
 142
 143         for(size_t i = 0; i < nchannels; i++) {
 144                 assert(meshlink_channel_aio_send(mesh_a, channels[i], outdata, size / 3, aio_cb, &out_infos[i].aio_infos[0]));
 145                 assert(meshlink_channel_aio_send(mesh_a, channels[i], outdata + size / 3, size - size / 3, aio_cb, &out_infos[i].aio_infos[1]));
 146         }
 147
 148         // Send a little bit on the last channel using a regular send
 149
 150         assert(meshlink_channel_send(mesh_a, channels[nchannels], outdata, smallsize) == (ssize_t)smallsize);
 151
 152         // Wait for everyone to finish.
 153
 154         assert(wait_sync_flag(&b_received_flag, 10));
 155
 156         for(size_t i = 0; i < nchannels; i++) {
 157                 assert(wait_sync_flag(&out_infos[i].aio_infos[0].flag, 10));
 158                 assert(wait_sync_flag(&out_infos[i].aio_infos[1].flag, 10));
 159                 assert(wait_sync_flag(&in_infos[i].aio_infos[0].flag, 10));
 160                 assert(wait_sync_flag(&in_infos[i].aio_infos[1].flag, 10));
 161         }
 162
 163         // Check that everything is correct.
 164
 165         assert(b_received_len == smallsize);
 166
 167         for(size_t i = 0; i < nchannels; i++) {
 168                 // Data should be transferred intact.
 169                 assert(!memcmp(in_infos[i].data, out_infos[i].data, size));
 170
 171                 // One callback for each AIO buffer.
 172                 assert(out_infos[i].aio_infos[0].callbacks == 1);
 173                 assert(out_infos[i].aio_infos[1].callbacks == 1);
 174                 assert(in_infos[i].aio_infos[0].callbacks == 1);
 175                 assert(in_infos[i].aio_infos[1].callbacks == 1);
 176
 177                 // Correct size sent and received.
 178                 assert(out_infos[i].aio_infos[0].size == size / 3);
 179                 assert(out_infos[i].aio_infos[1].size == size - size / 3);
 180                 assert(in_infos[i].aio_infos[0].size == size / 4);
 181                 assert(in_infos[i].aio_infos[1].size == size - size / 4);
 182
 183                 // First batch of data should all be sent and received before the second batch
 184                 for(size_t j = 0; j < nchannels; j++) {
 185                         assert(timespec_lt(&out_infos[i].aio_infos[0].ts, &out_infos[j].aio_infos[1].ts));
 186                         assert(timespec_lt(&in_infos[i].aio_infos[0].ts, &in_infos[j].aio_infos[1].ts));
 187                 }
 188
 189                 // The non-AIO transfer should have completed before everything else
 190                 assert(!timespec_lt(&out_infos[i].aio_infos[0].ts, &b_received_ts));
 191                 assert(!timespec_lt(&in_infos[i].aio_infos[0].ts, &b_received_ts));
 192
 193                 free(in_infos[i].data);
 194         }
 195
 196         // Clean up.
 197
 198         close_meshlink_pair(mesh_a, mesh_b);
 199         free(outdata);
 200 }