Factor out timeval-related functions.

svn:r237

src/common/Makefile.am

@@ -3,7 +3,7 @@ noinst_LIBRARIES = libor.a
 
 #CFLAGS  = -Wall -Wpointer-arith -O2
 
-libor_a_SOURCES = log.c crypto.c fakepoll.c
+libor_a_SOURCES = log.c crypto.c fakepoll.c util.c
 
-noinst_HEADERS = log.h ss.h version.h crypto.h fakepoll.h test.h
+noinst_HEADERS = log.h ss.h version.h crypto.h fakepoll.h test.h util.h
 

src/common/util.c

@@ -0,0 +1,58 @@
+/* Copyright 2003 Roger Dingledine */
+/* See LICENSE for licensing information */
+/* $Id$ */
+
+#include <stdlib.h>
+#include "util.h"
+#include "log.h"
+
+void 
+my_gettimeofday(struct timeval *timeval) 
+{
+  if (gettimeofday(timeval, NULL)) {
+    log(LOG_ERR, "my_gettimeofday: gettimeofday failed.");
+    /* If gettimeofday dies, we have either given a bad timezone (we didn't),
+       or segfaulted.*/
+    exit(1);
+  }
+  return;
+}
+
+long
+tv_udiff(struct timeval *start, struct timeval *end)
+{
+  long secdiff = end->tv_sec - start->tv_sec;
+  if (secdiff+1 > LONG_MAX/1000000) {
+    log(LOG_NOTICE, "tv_udiff(): comparing times too far apart.");
+    return LONG_MAX;
+  }
+  if (end->tv_usec < start->tv_usec) {
+    end->tv_sec--;
+    end->tv_usec += 1000000L;
+  }
+  return secdiff*1000000L + (end->tv_usec - start->tv_usec);
+}
+
+int tv_cmp(struct timeval *a, struct timeval *b) {
+  if (a->tv_sec > b->tv_sec)
+    return 1;
+  if (a->tv_sec < b->tv_sec)
+    return -1;
+  if (a->tv_usec > b->tv_usec)
+    return 1;
+  if (a->tv_usec < b->tv_usec)
+    return -1;
+  return 0;
+}
+
+void tv_add(struct timeval *a, struct timeval *b) {
+  a->tv_usec += b->tv_usec;
+  a->tv_sec += b->tv_sec + (a->tv_usec / 1000000);
+  a->tv_usec %= 1000000;
+}
+
+void tv_addms(struct timeval *a, long ms) {
+  a->tv_usec += (ms * 1000) % 1000000;
+  a->tv_sec += ((ms * 1000) / 1000000) + (a->tv_usec / 1000000);
+  a->tv_usec %= 1000000;
+}

src/common/util.h

@@ -0,0 +1,20 @@
+/* Copyright 2003 Roger Dingledine */
+/* See LICENSE for licensing information */
+/* $Id$ */
+
+#ifndef __UTIL_H
+#define __UTIL_H
+
+#include <sys/time.h>
+
+/* Same as gettimeofday, but no need to check exit value. */
+void my_gettimeofday(struct timeval *timeval);
+/* Returns the number of microseconds between start and end.  Requires that
+ * end >= start, and that the number of microseconds < LONG_MAX. */
+long tv_udiff(struct timeval *start, struct timeval *end);
+
+void tv_addms(struct timeval *a, long ms);
+void tv_add(struct timeval *a, struct timeval *b);
+int tv_cmp(struct timeval *a, struct timeval *b);
+
+#endif

src/or/circuit.c

@@ -53,8 +53,7 @@ circuit_t *circuit_new(aci_t p_aci, connection_t *p_conn) {
   circuit_t *circ; 
   struct timeval now;
 
-  if(gettimeofday(&now,NULL) < 0)
-    return NULL;
+  my_gettimeofday(&now);
 
   circ = (circuit_t *)malloc(sizeof(circuit_t));
   if(!circ)
@@ -157,7 +156,7 @@ int circuit_init(circuit_t *circ, int aci_type, onion_layer_t *layer) {
 
   log(LOG_DEBUG,"circuit_init(): aci_type = %u.",aci_type);
 
-  gettimeofday(&start,NULL);
+  my_gettimeofday(&start);
 
   circ->n_aci = get_unique_aci_by_addr_port(circ->n_addr, circ->n_port, aci_type);
   if(!circ->n_aci) {
@@ -165,19 +164,12 @@ int circuit_init(circuit_t *circ, int aci_type, onion_layer_t *layer) {
     return -1;
   }
 
-  gettimeofday(&end,NULL);
+  my_gettimeofday(&end);
 
-  if(end.tv_usec < start.tv_usec) {
-    end.tv_sec--;
-    end.tv_usec += 1000000;
-  }
-  time_passed = ((end.tv_sec - start.tv_sec)*1000000) + (end.tv_usec - start.tv_usec);
-  if(time_passed > 1000) { /* more than 1ms */
+  if (tv_udiff(&start, &end) > 1000) {/* more than 1ms */
     log(LOG_NOTICE,"circuit_init(): get_unique_aci just took %d us!",time_passed);
   }
 
-
-
   log(LOG_DEBUG,"circuit_init(): Chosen ACI %u.",circ->n_aci);
 
   /* keys */

src/or/command.c

@@ -14,23 +14,13 @@ void command_time_process_cell(cell_t *cell, connection_t *conn,
 
   *num += 1;
 
-  if(gettimeofday(&start,NULL) < 0) {
-    log(LOG_ERR,"command_time_process_cell(): gettimeofday failed.");
-    return;
-  }
+  my_gettimeofday(&start);
 
   (*func)(cell, conn);
 
-  if(gettimeofday(&end,NULL) < 0) {
-    log(LOG_ERR,"command_time_process_cell(): gettimeofday failed.");
-    return;
-  }
+  my_gettimeofday(&end);
+  time_passed = tv_udiff(&start, &end) ;
 
-  if(end.tv_usec < start.tv_usec) {
-    end.tv_sec--;
-    end.tv_usec += 1000000;
-  }
-  time_passed = ((end.tv_sec - start.tv_sec)*1000000) + (end.tv_usec - start.tv_usec);
   if (time_passed > 5000) { /* more than 5ms */
     log(LOG_INFO,"command_time_process_cell(): That call just took %d ms.",time_passed/1000);
   }
@@ -43,10 +33,7 @@ void command_process_cell(cell_t *cell, connection_t *conn) {
   static long current_second = 0; /* from previous calls to gettimeofday */
   struct timeval now;
 
-  if(gettimeofday(&now,NULL) < 0) {
-    log(LOG_ERR,"command_process_cell(): gettimeofday failed.");
-    return;
-  }
+  my_gettimeofday(&now);
 
   if(now.tv_sec > current_second) { /* the second has rolled over */
     /* print stats */

src/or/connection.c

@@ -61,31 +61,6 @@ char *conn_state_to_string[][15] = {
 
 /********* END VARIABLES ************/
 
-/**************************************************************/
-
-int tv_cmp(struct timeval *a, struct timeval *b) {
-        if (a->tv_sec > b->tv_sec)
-                return 1;
-        if (a->tv_sec < b->tv_sec)
-                return -1;
-        if (a->tv_usec > b->tv_usec)
-                return 1;
-        if (a->tv_usec < b->tv_usec)
-                return -1;
-        return 0;
-}
-
-void tv_add(struct timeval *a, struct timeval *b) {
-        a->tv_usec += b->tv_usec;
-        a->tv_sec += b->tv_sec + (a->tv_usec / 1000000);
-        a->tv_usec %= 1000000;
-}
-
-void tv_addms(struct timeval *a, long ms) {
-        a->tv_usec += (ms * 1000) % 1000000;
-        a->tv_sec += ((ms * 1000) / 1000000) + (a->tv_usec / 1000000);
-        a->tv_usec %= 1000000;
-}
 
 /**************************************************************/
 
@@ -93,8 +68,7 @@ connection_t *connection_new(int type) {
   connection_t *conn;
   struct timeval now;
 
-  if(gettimeofday(&now,NULL) < 0)
-    return NULL;
+  my_gettimeofday(&now);
 
   conn = (connection_t *)malloc(sizeof(connection_t));
   if(!conn)
@@ -328,8 +302,8 @@ int connection_read_to_buf(connection_t *conn) {
     assert(conn->receiver_bucket < 0);
   }
 
-  if(gettimeofday(&now,NULL) < 0)
-    return -1;
+  my_gettimeofday(&now);
+
   conn->timestamp_lastread = now.tv_sec;
 
   read_result = read_to_buf(conn->s, conn->receiver_bucket, &conn->inbuf, &conn->inbuflen,
@@ -395,8 +369,7 @@ int connection_decompress_to_buf(char *string, int len, connection_t *conn,
   if (n < 0)
     return -1;
 
-  if(gettimeofday(&now,NULL) < 0)
-    return -1;
+  my_gettimeofday(&now,NULL);
   
   if(!n)
     return 0;
@@ -430,8 +403,7 @@ int connection_flush_buf(connection_t *conn) {
 int connection_write_to_buf(char *string, int len, connection_t *conn) {
   struct timeval now;
 
-  if(gettimeofday(&now,NULL) < 0)
-    return -1;
+  my_gettimeofday(&now);
 
   if(!len)
     return 0;
@@ -585,8 +557,7 @@ void connection_init_timeval(connection_t *conn) {
 
   assert(conn);
 
-  if(gettimeofday(&conn->send_timeval,NULL) < 0)
-    return;
+  my_gettimeofday(&conn->send_timeval);
 
   connection_increment_send_timeval(conn);
 }

src/or/main.c

@@ -307,8 +307,7 @@ int prepare_for_poll(int *timeout) {
   cell_t cell;
   circuit_t *circ;
 
-  if(gettimeofday(&now,NULL) < 0)
-    return -1;
+  my_gettimeofday(&now);
 
   if(now.tv_sec > current_second) { /* the second has rolled over. check more stuff. */
 
@@ -535,8 +534,7 @@ void dumpstats(void) { /* dump stats to stdout */
   extern char *conn_state_to_string[][15];
 
   printf("Dumping stats:\n");
-  if(gettimeofday(&now,NULL) < 0)
-    return ;
+  my_gettimeofday(&now);
 
   for(i=0;i<nfds;i++) {
     conn = connection_array[i];

src/or/or.h

@@ -46,6 +46,7 @@
 #include "../common/log.h"
 #include "../common/ss.h"
 #include "../common/version.h"
+#include "../common/util.h"
 
 #define MAXCONNECTIONS 1000 /* upper bound on max connections.
                               can be lowered by config file */