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 void receive_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, const void *data, size_t len) {
  49         (void)mesh;
  50         (void)channel;
  51         (void)data;
  52
  53         b_received_len += len;
  54
  55         if(b_received_len >= smallsize) {
  56                 clock_gettime(CLOCK_MONOTONIC, &b_received_ts);
  57                 set_sync_flag(&b_received_flag, true);
  58         }
  59 }
  60
  61 static bool accept_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
  62         assert(port && port <= nchannels + 1);
  63         assert(!data);
  64         assert(!len);
  65
  66         if(port <= nchannels) {
  67                 struct channel_info *infos = mesh->priv;
  68                 struct channel_info *info = &infos[port - 1];
  69
  70                 assert(meshlink_channel_aio_receive(mesh, channel, info->data, size / 4, aio_cb, &info->aio_infos[0]));
  71                 assert(meshlink_channel_aio_receive(mesh, channel, info->data + size / 4, size - size / 4, aio_cb, &info->aio_infos[1]));
  72         } else {
  73                 meshlink_set_channel_receive_cb(mesh, channel, receive_cb);
  74         }
  75
  76         return true;
  77 }
  78
  79 int main(void) {
  80         init_sync_flag(&b_received_flag);
  81
  82         meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_cb);
  83
  84         // Prepare data buffers
  85
  86         char *outdata = malloc(size);
  87         assert(outdata);
  88
  89         for(size_t i = 0; i < size; i++) {
  90                 outdata[i] = i;
  91         }
  92
  93         struct channel_info in_infos[nchannels];
  94
  95         struct channel_info out_infos[nchannels];
  96
  97         memset(in_infos, 0, sizeof(in_infos));
  98
  99         memset(out_infos, 0, sizeof(out_infos));
 100
 101         for(size_t i = 0; i < nchannels; i++) {
 102                 init_sync_flag(&in_infos[i].aio_infos[0].flag);
 103                 init_sync_flag(&in_infos[i].aio_infos[1].flag);
 104                 init_sync_flag(&out_infos[i].aio_infos[0].flag);
 105                 init_sync_flag(&out_infos[i].aio_infos[1].flag);
 106
 107                 in_infos[i].data = malloc(size);
 108                 assert(in_infos[i].data);
 109                 out_infos[i].data = outdata;
 110         }
 111
 112         // Open two new meshlink instance.
 113
 114         meshlink_handle_t *mesh_a, *mesh_b;
 115         open_meshlink_pair(&mesh_a, &mesh_b, "channels_aio");
 116
 117         // Set the callbacks.
 118
 119         mesh_b->priv = in_infos;
 120
 121         meshlink_set_channel_accept_cb(mesh_b, accept_cb);
 122
 123         // Start both instances
 124
 125         start_meshlink_pair(mesh_a, mesh_b);
 126
 127         // Open channels from a to b.
 128
 129         meshlink_node_t *b = meshlink_get_node(mesh_a, "b");
 130         assert(b);
 131
 132         meshlink_channel_t *channels[nchannels + 1];
 133
 134         for(size_t i = 0; i < nchannels + 1; i++) {
 135                 channels[i] = meshlink_channel_open(mesh_a, b, i + 1, NULL, NULL, 0);
 136                 assert(channels[i]);
 137         }
 138
 139         // Send a large buffer of data on each channel.
 140
 141         for(size_t i = 0; i < nchannels; i++) {
 142                 assert(meshlink_channel_aio_send(mesh_a, channels[i], outdata, size / 3, aio_cb, &out_infos[i].aio_infos[0]));
 143                 assert(meshlink_channel_aio_send(mesh_a, channels[i], outdata + size / 3, size - size / 3, aio_cb, &out_infos[i].aio_infos[1]));
 144         }
 145
 146         // Send a little bit on the last channel using a regular send
 147
 148         assert(meshlink_channel_send(mesh_a, channels[nchannels], outdata, smallsize) == (ssize_t)smallsize);
 149
 150         // Wait for everyone to finish.
 151
 152         assert(wait_sync_flag(&b_received_flag, 10));
 153
 154         for(size_t i = 0; i < nchannels; i++) {
 155                 assert(wait_sync_flag(&out_infos[i].aio_infos[0].flag, 10));
 156                 assert(wait_sync_flag(&out_infos[i].aio_infos[1].flag, 10));
 157                 assert(wait_sync_flag(&in_infos[i].aio_infos[0].flag, 10));
 158                 assert(wait_sync_flag(&in_infos[i].aio_infos[1].flag, 10));
 159         }
 160
 161         // Check that everything is correct.
 162
 163         assert(b_received_len == smallsize);
 164
 165         for(size_t i = 0; i < nchannels; i++) {
 166                 // Data should be transferred intact.
 167                 assert(!memcmp(in_infos[i].data, out_infos[i].data, size));
 168
 169                 // One callback for each AIO buffer.
 170                 assert(out_infos[i].aio_infos[0].callbacks == 1);
 171                 assert(out_infos[i].aio_infos[1].callbacks == 1);
 172                 assert(in_infos[i].aio_infos[0].callbacks == 1);
 173                 assert(in_infos[i].aio_infos[1].callbacks == 1);
 174
 175                 // Correct size sent and received.
 176                 assert(out_infos[i].aio_infos[0].size == size / 3);
 177                 assert(out_infos[i].aio_infos[1].size == size - size / 3);
 178                 assert(in_infos[i].aio_infos[0].size == size / 4);
 179                 assert(in_infos[i].aio_infos[1].size == size - size / 4);
 180
 181                 // First batch of data should all be sent and received before the second batch
 182                 for(size_t j = 0; j < nchannels; j++) {
 183                         assert(timespec_lt(&out_infos[i].aio_infos[0].ts, &out_infos[j].aio_infos[1].ts));
 184                         assert(timespec_lt(&in_infos[i].aio_infos[0].ts, &in_infos[j].aio_infos[1].ts));
 185                 }
 186
 187                 // The non-AIO transfer should have completed before everything else
 188                 assert(!timespec_lt(&out_infos[i].aio_infos[0].ts, &b_received_ts));
 189                 assert(!timespec_lt(&in_infos[i].aio_infos[0].ts, &b_received_ts));
 190         }
 191
 192         // Clean up.
 193
 194         close_meshlink_pair(mesh_a, mesh_b);
 195 }