git.sesse.net Git - cubemap/blob - stats.cpp

   1 #include <errno.h>
   2 #include <fcntl.h>
   3 #include <poll.h>
   4 #include <stddef.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <time.h>
   9 #include <unistd.h>
  10 #include <vector>
  11
  12 #include "client.h"
  13 #include "log.h"
  14 #include "serverpool.h"
  15 #include "stats.h"
  16 #include "util.h"
  17
  18 using namespace std;
  19
  20 extern ServerPool *servers;
  21
  22 StatsThread::StatsThread(const std::string &stats_file, int stats_interval)
  23         : stats_file(stats_file),
  24           stats_interval(stats_interval)
  25 {
  26 }
  27
  28 void StatsThread::do_work()
  29 {
  30         while (!should_stop()) {
  31                 int fd;
  32                 FILE *fp;
  33                 time_t now;
  34                 vector<ClientStats> client_stats;
  35
  36                 // Open a new, temporary file.
  37                 char *filename = strdup((stats_file + ".new.XXXXXX").c_str());
  38                 fd = mkostemp(filename, O_WRONLY);
  39                 if (fd == -1) {
  40                         log_perror(filename);
  41                         free(filename);
  42                         goto sleep;
  43                 }
  44
  45                 fp = fdopen(fd, "w");
  46                 if (fp == NULL) {
  47                         log_perror("fdopen");
  48                         safe_close(fd);
  49                         if (unlink(filename) == -1) {
  50                                 log_perror(filename);
  51                         }
  52                         free(filename);
  53                         goto sleep;
  54                 }
  55
  56                 now = time(NULL);
  57                 client_stats = servers->get_client_stats();
  58                 for (size_t i = 0; i < client_stats.size(); ++i) {
  59                         fprintf(fp, "%s %d %d %s %d %llu %llu %llu\n",
  60                                 client_stats[i].remote_addr.c_str(),
  61                                 client_stats[i].sock,
  62                                 client_stats[i].fwmark,
  63                                 client_stats[i].stream_id.c_str(),
  64                                 int(now - client_stats[i].connect_time),
  65                                 (long long unsigned)(client_stats[i].bytes_sent),
  66                                 (long long unsigned)(client_stats[i].bytes_lost),
  67                                 (long long unsigned)(client_stats[i].num_loss_events));
  68                 }
  69                 if (fclose(fp) == EOF) {
  70                         log_perror("fclose");
  71                         if (unlink(filename) == -1) {
  72                                 log_perror(filename);
  73                         }
  74                         free(filename);
  75                         goto sleep;
  76                 }
  77
  78                 if (rename(filename, stats_file.c_str()) == -1) {
  79                         log_perror("rename");
  80                         if (unlink(filename) == -1) {
  81                                 log_perror(filename);
  82                         }
  83                 }
  84                 free(filename);
  85
  86 sleep:
  87                 // Wait until we are asked to quit, stats_interval timeout,
  88                 // or a spurious signal. (The latter will cause us to write stats
  89                 // too often, but that's okay.)
  90                 timespec timeout_ts;
  91                 timeout_ts.tv_sec = stats_interval;
  92                 timeout_ts.tv_nsec = 0;
  93                 wait_for_wakeup(&timeout_ts);
  94         }
  95 }