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 reject_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
  45         (void)mesh;
  46         (void)channel;
  47         (void)port;
  48         (void)data;
  49         (void)len;
  50
  51         return false;
  52 }
  53
  54 static bool accept_cb(meshlink_handle_t *mesh, meshlink_channel_t *channel, uint16_t port, const void *data, size_t len) {
  55         assert(port && port <= nchannels);
  56         assert(!data);
  57         assert(!len);
  58
  59         struct channel_info *infos = mesh->priv;
  60         struct channel_info *info = &infos[port - 1];
  61
  62         assert(meshlink_channel_aio_fd_receive(mesh, channel, fileno(info->file), size / 4, aio_fd_cb, &info->aio_infos[0]));
  63         assert(meshlink_channel_aio_fd_receive(mesh, channel, fileno(info->file), size - size / 4, aio_fd_cb, &info->aio_infos[1]));
  64
  65         return true;
  66 }
  67
  68 int main(void) {
  69         meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_cb);
  70
  71         // Prepare file
  72
  73         char *outdata = malloc(size);
  74         assert(outdata);
  75
  76         for(size_t i = 0; i < size; i++) {
  77                 // Human readable output
  78                 outdata[i] = i % 96 ? i % 96 + 32 : '\n';
  79         }
  80
  81         FILE *file = fopen("channels_aio_fd.in", "w");
  82         assert(file);
  83         assert(fwrite(outdata, size, 1, file) == 1);
  84         assert(fclose(file) == 0);
  85
  86         struct channel_info in_infos[nchannels];
  87         struct channel_info out_infos[nchannels];
  88
  89         memset(in_infos, 0, sizeof(in_infos));
  90         memset(out_infos, 0, sizeof(out_infos));
  91
  92         for(size_t i = 0; i < nchannels; i++) {
  93                 init_sync_flag(&in_infos[i].aio_infos[0].flag);
  94                 init_sync_flag(&in_infos[i].aio_infos[1].flag);
  95                 init_sync_flag(&out_infos[i].aio_infos[0].flag);
  96                 init_sync_flag(&out_infos[i].aio_infos[1].flag);
  97
  98                 char filename[PATH_MAX];
  99                 snprintf(filename, sizeof(filename), "channels_aio_fd.out%d", (int)i);
 100                 in_infos[i].file = fopen(filename, "w");
 101                 assert(in_infos[i].file);
 102                 out_infos[i].file = fopen("channels_aio_fd.in", "r");
 103                 assert(out_infos[i].file);
 104         }
 105
 106         // Open two new meshlink instance.
 107
 108         meshlink_handle_t *mesh_a, *mesh_b;
 109         open_meshlink_pair(&mesh_a, &mesh_b, "channels_aio_fd");
 110
 111         mesh_b->priv = in_infos;
 112
 113         meshlink_enable_discovery(mesh_a, false);
 114         meshlink_enable_discovery(mesh_b, false);
 115
 116         // Set the callbacks.
 117
 118         meshlink_set_channel_accept_cb(mesh_a, reject_cb);
 119         meshlink_set_channel_accept_cb(mesh_b, accept_cb);
 120
 121         // Start both instances
 122
 123         start_meshlink_pair(mesh_a, mesh_b);
 124
 125         // Open channels from a to b.
 126
 127         meshlink_node_t *b = meshlink_get_node(mesh_a, "b");
 128         assert(b);
 129
 130         meshlink_channel_t *channels[nchannels];
 131
 132         for(size_t i = 0; i < nchannels; i++) {
 133                 channels[i] = meshlink_channel_open(mesh_a, b, i + 1, NULL, NULL, 0);
 134                 assert(channels[i]);
 135         }
 136
 137         // Send a large buffer of data on each channel.
 138
 139         for(size_t i = 0; i < nchannels; i++) {
 140                 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]));
 141                 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]));
 142         }
 143
 144         // Wait for everyone to finish.
 145
 146         for(size_t i = 0; i < nchannels; i++) {
 147                 assert(wait_sync_flag(&out_infos[i].aio_infos[0].flag, 10));
 148                 assert(wait_sync_flag(&out_infos[i].aio_infos[1].flag, 10));
 149                 assert(wait_sync_flag(&in_infos[i].aio_infos[0].flag, 10));
 150                 assert(wait_sync_flag(&in_infos[i].aio_infos[1].flag, 10));
 151         }
 152
 153         // Check that everything is correct.
 154
 155         for(size_t i = 0; i < nchannels; i++) {
 156                 assert(fclose(in_infos[i].file) == 0);
 157                 assert(fclose(out_infos[i].file) == 0);
 158
 159                 // One callback for each AIO buffer.
 160                 assert(out_infos[i].aio_infos[0].callbacks == 1);
 161                 assert(out_infos[i].aio_infos[1].callbacks == 1);
 162                 assert(in_infos[i].aio_infos[0].callbacks == 1);
 163                 assert(in_infos[i].aio_infos[1].callbacks == 1);
 164
 165                 // Correct size sent and received.
 166                 assert(out_infos[i].aio_infos[0].size == size / 3);
 167                 assert(out_infos[i].aio_infos[1].size == size - size / 3);
 168                 assert(in_infos[i].aio_infos[0].size == size / 4);
 169                 assert(in_infos[i].aio_infos[1].size == size - size / 4);
 170
 171                 // First batch of data should all be sent and received before the second batch
 172                 for(size_t j = 0; j < nchannels; j++) {
 173                         assert(timespec_lt(&out_infos[i].aio_infos[0].ts, &out_infos[j].aio_infos[1].ts));
 174                         assert(timespec_lt(&in_infos[i].aio_infos[0].ts, &in_infos[j].aio_infos[1].ts));
 175                 }
 176
 177                 // Files should be identical
 178                 char command[PATH_MAX];
 179                 snprintf(command, sizeof(command), "cmp channels_aio_fd.in channels_aio_fd.out%d", (int)i);
 180                 assert(system(command) == 0);
 181
 182         }
 183
 184         // Clean up.
 185
 186         close_meshlink_pair(mesh_a, mesh_b);
 187 }