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Fixed a possible integer overflow in GetAbsTime()

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This commit is contained in:
Klaus Schmidinger
2008-09-06 09:41:15 +02:00
parent 248b7424be
commit 2e66fdd634
3 changed files with 12 additions and 8 deletions
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13
thread.c
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@@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: thread.c 2.1 2008/04/13 11:53:56 kls Exp $
* $Id: thread.c 2.2 2008/09/06 09:39:43 kls Exp $
*/
#include "thread.h"
@@ -25,11 +25,12 @@ static bool GetAbsTime(struct timespec *Abstime, int MillisecondsFromNow)
{
struct timeval now;
if (gettimeofday(&now, NULL) == 0) { // get current time
now.tv_usec += MillisecondsFromNow * 1000; // add the timeout
while (now.tv_usec >= 1000000) { // take care of an overflow
now.tv_sec++;
now.tv_usec -= 1000000;
}
now.tv_sec += MillisecondsFromNow / 1000; // add full seconds
now.tv_usec += (MillisecondsFromNow % 1000) * 1000; // add microseconds
if (now.tv_usec >= 1000000) { // take care of an overflow
now.tv_sec++;
now.tv_usec -= 1000000;
}
Abstime->tv_sec = now.tv_sec; // seconds
Abstime->tv_nsec = now.tv_usec * 1000; // nano seconds
return true;