add new ply_get_timestamp() function

This commit adds a function, ply_get_timestamp(), that returns
the current time in seconds since the epoch as a double.

2 files changed, 15 insertions, 0 deletions

diff --git a/src/ply-utils.c b/src/ply-utils.c
index 0e55dfb..b395504 100644
--- a/src/ply-utils.c
+++ b/src/ply-utils.c
@@ -228,4 +228,18 @@ ply_close_all_fds (void)
     close (fd);
 }
 
+double 
+ply_get_timestamp (void)
+{
+  const double microseconds_per_second = 1000000.0;
+  double timestamp;
+  struct timeval now = { 0L, /* zero-filled */ };
+
+  gettimeofday (&now, NULL);
+  timestamp = ((microseconds_per_second * now.tv_sec) + now.tv_usec) /
+               microseconds_per_second;
+
+  return timestamp;
+}
+
 /* vim: set ts=4 sw=4 expandtab autoindent cindent cino={.5s,(0: */
diff --git a/src/ply-utils.h b/src/ply-utils.h
index 1fa8d44..4da3f51 100644
--- a/src/ply-utils.h
+++ b/src/ply-utils.h
@@ -49,6 +49,7 @@ bool ply_fd_can_take_data (int fd);
 char **ply_copy_string_array (const char * const *array);
 void ply_free_string_array (char **array);
 void ply_close_all_fds (void);
+double ply_get_timestamp (void);
 #endif
 
 #endif /* PLY_UTILS_H */