git.meshlink.io Git - meshlink/blob - test/channels-aio-fd.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 #include <limits.h>
  12
  13 #include "meshlink.h"
  14 #include "utils.h"
  15
  16 static const size_t size = 1024 * 1024; // size of data to transfer
  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         FILE *file;
  28         struct aio_info aio_infos[2];
  29 };
  30
  31 static void aio_fd_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, int fd, size_t len, void *priv) {
  32         (void)mesh;
  33         (void)channel;
  34         (void)fd;
  35         (void)len;
  36
  37         struct aio_info *info = priv;
  38         clock_gettime(CLOCK_MONOTONIC, &info->ts);
  39         info->callbacks++;
  40         info->size += len;
  41         set_sync_flag(&info->flag, true);
  42 }
  43
  44 static bool accept_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
  45         assert(port && port <= nchannels);
  46         assert(!data);
  47         assert(!len);
  48
  49         struct channel_info *infos = mesh->priv;
  50         struct channel_info *info = &infos[port - 1];
  51
  52         assert(meshlink_channel_aio_fd_receive(mesh, channel, fileno(info->file), size / 4, aio_fd_cb, &info->aio_infos[0]));
  53         assert(meshlink_channel_aio_fd_receive(mesh, channel, fileno(info->file), size - size / 4, aio_fd_cb, &info->aio_infos[1]));
  54
  55         return true;
  56 }
  57
  58 int main(void) {
  59         meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_cb);
  60
  61         // Prepare file
  62
  63         char *outdata = malloc(size);
  64         assert(outdata);
  65
  66         for(size_t i = 0; i < size; i++) {
  67                 // Human readable output
  68                 outdata[i] = i % 96 ? i % 96 + 32 : '\n';
  69         }
  70
  71         FILE *file = fopen("channels_aio_fd.in", "w");
  72         assert(file);
  73         assert(fwrite(outdata, size, 1, file) == 1);
  74         assert(fclose(file) == 0);
  75
  76         struct channel_info in_infos[nchannels];
  77         struct channel_info out_infos[nchannels];
  78
  79         memset(in_infos, 0, sizeof(in_infos));
  80         memset(out_infos, 0, sizeof(out_infos));
  81
  82         for(size_t i = 0; i < nchannels; i++) {
  83                 init_sync_flag(&in_infos[i].aio_infos[0].flag);
  84                 init_sync_flag(&in_infos[i].aio_infos[1].flag);
  85                 init_sync_flag(&out_infos[i].aio_infos[0].flag);
  86                 init_sync_flag(&out_infos[i].aio_infos[1].flag);
  87
  88                 char filename[PATH_MAX];
  89                 snprintf(filename, sizeof(filename), "channels_aio_fd.out%d", (int)i);
  90                 in_infos[i].file = fopen(filename, "w");
  91                 assert(in_infos[i].file);
  92                 out_infos[i].file = fopen("channels_aio_fd.in", "r");
  93                 assert(out_infos[i].file);
  94         }
  95
  96         // Open two new meshlink instance.
  97
  98         meshlink_handle_t *mesh_a, *mesh_b;
  99         open_meshlink_pair(&mesh_a, &mesh_b, "channels_aio_fd");
 100
 101         mesh_b->priv = in_infos;
 102
 103         meshlink_enable_discovery(mesh_a, false);
 104         meshlink_enable_discovery(mesh_b, false);
 105
 106         // Set the callbacks.
 107
 108         meshlink_set_channel_accept_cb(mesh_b, accept_cb);
 109
 110         // Start both instances
 111
 112         start_meshlink_pair(mesh_a, mesh_b);
 113
 114         // Open channels from a to b.
 115
 116         meshlink_node_t *b = meshlink_get_node(mesh_a, "b");
 117         assert(b);
 118
 119         meshlink_channel_t *channels[nchannels];
 120
 121         for(size_t i = 0; i < nchannels; i++) {
 122                 channels[i] = meshlink_channel_open(mesh_a, b, i + 1, NULL, NULL, 0);
 123                 assert(channels[i]);
 124         }
 125
 126         // Send a large buffer of data on each channel.
 127
 128         for(size_t i = 0; i < nchannels; i++) {
 129                 assert(meshlink_channel_aio_fd_send(mesh_a, channels[i], fileno(out_infos[i].file), size / 3, aio_fd_cb, &out_infos[i].aio_infos[0]));
 130                 assert(meshlink_channel_aio_fd_send(mesh_a, channels[i], fileno(out_infos[i].file), size - size / 3, aio_fd_cb, &out_infos[i].aio_infos[1]));
 131         }
 132
 133         // Wait for everyone to finish.
 134
 135         for(size_t i = 0; i < nchannels; i++) {
 136                 assert(wait_sync_flag(&out_infos[i].aio_infos[0].flag, 10));
 137                 assert(wait_sync_flag(&out_infos[i].aio_infos[1].flag, 10));
 138                 assert(wait_sync_flag(&in_infos[i].aio_infos[0].flag, 10));
 139                 assert(wait_sync_flag(&in_infos[i].aio_infos[1].flag, 10));
 140         }
 141
 142         // Check that everything is correct.
 143
 144         for(size_t i = 0; i < nchannels; i++) {
 145                 assert(fclose(in_infos[i].file) == 0);
 146                 assert(fclose(out_infos[i].file) == 0);
 147
 148                 // One callback for each AIO buffer.
 149                 assert(out_infos[i].aio_infos[0].callbacks == 1);
 150                 assert(out_infos[i].aio_infos[1].callbacks == 1);
 151                 assert(in_infos[i].aio_infos[0].callbacks == 1);
 152                 assert(in_infos[i].aio_infos[1].callbacks == 1);
 153
 154                 // Correct size sent and received.
 155                 assert(out_infos[i].aio_infos[0].size == size / 3);
 156                 assert(out_infos[i].aio_infos[1].size == size - size / 3);
 157                 assert(in_infos[i].aio_infos[0].size == size / 4);
 158                 assert(in_infos[i].aio_infos[1].size == size - size / 4);
 159
 160                 // First batch of data should all be sent and received before the second batch
 161                 for(size_t j = 0; j < nchannels; j++) {
 162                         assert(timespec_lt(&out_infos[i].aio_infos[0].ts, &out_infos[j].aio_infos[1].ts));
 163                         assert(timespec_lt(&in_infos[i].aio_infos[0].ts, &in_infos[j].aio_infos[1].ts));
 164                 }
 165
 166                 // Files should be identical
 167                 char command[PATH_MAX];
 168                 snprintf(command, sizeof(command), "cmp channels_aio_fd.in channels_aio_fd.out%d", (int)i);
 169                 assert(system(command) == 0);
 170
 171         }
 172
 173         // Clean up.
 174
 175         close_meshlink_pair(mesh_a, mesh_b);
 176 }