vdr-plugin-streamdev/tools/select.c
2008-03-13 15:58:24 +00:00

52 lines
1.2 KiB
C

#include "tools/select.h"
#include <vdr/tools.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
cTBSelect::cTBSelect(void) {
Clear();
}
cTBSelect::~cTBSelect() {
}
int cTBSelect::Select(uint TimeoutMs) {
struct timeval tv;
ssize_t res = 0;
int ms;
tv.tv_usec = (TimeoutMs % 1000) * 1000;
tv.tv_sec = TimeoutMs / 1000;
memcpy(m_FdsResult, m_FdsQuery, sizeof(m_FdsResult));
if (TimeoutMs == 0)
return ::select(m_MaxFiled + 1, &m_FdsResult[0], &m_FdsResult[1], NULL, &tv);
cTimeMs starttime;
ms = TimeoutMs;
while (ms > 0 && (res = ::select(m_MaxFiled + 1, &m_FdsResult[0], &m_FdsResult[1], NULL,
&tv)) == -1 && errno == EINTR) {
ms = TimeoutMs - starttime.Elapsed();
tv.tv_usec = (ms % 1000) * 1000;
tv.tv_sec = ms / 1000;
memcpy(m_FdsResult, m_FdsQuery, sizeof(m_FdsResult));
}
if (ms <= 0 || res == 0) {
errno = ETIMEDOUT;
return -1;
}
return res;
}
int cTBSelect::Select(void) {
ssize_t res;
do {
memcpy(m_FdsResult, m_FdsQuery, sizeof(m_FdsResult));
} while ((res = ::select(m_MaxFiled + 1, &m_FdsResult[0], &m_FdsResult[1], NULL, NULL)) == -1 && errno == EINTR);
return res;
}