int aioPoll(int microSeconds)
{
int fd;
fd_set rd, wr, ex;
unsigned long long us;
FPRINTF((stderr, "aioPoll(%d)\n", microSeconds));
DO_TICK(SHOULD_TICK());
/* get out early if there is no pending i/o and no need to relinquish cpu */
if ((maxFd == 0) && (microSeconds == 0))
return 0;
rd= rdMask;
wr= wrMask;
ex= exMask;
us= ioUTCMicroseconds();
for (;;)
{
struct timeval tv;
int n;
unsigned long long now;
tv.tv_sec= microSeconds / 1000000;
tv.tv_usec= microSeconds % 1000000;
n= select(maxFd, &rd, &wr, &ex, &tv);
if (n > 0) break;
if (n == 0) return 0;
if (errno && (EINTR != errno))
{
fprintf(stderr, "errno %d\n", errno);
perror("select");
return 0;
}
now= ioUTCMicroseconds();
microSeconds -= max(now - us,1);
if (microSeconds <= 0)
return 0;
us= now;
}
for (fd= 0; fd < maxFd; ++fd)
{
# define _DO(FLAG, TYPE) \
{ \
if (FD_ISSET(fd, &TYPE)) \
{ \
aioHandler handler= TYPE##Handler[fd]; \
FD_CLR(fd, &TYPE##Mask); \
TYPE##Handler[fd]= undefinedHandler; \
handler(fd, clientData[fd], FLAG); \
} \
}
_DO_FLAG_TYPE();
# undef _DO
}
return 1;
}
int aioPoll(int microSeconds)
{
int fd, ms;
fd_set rd, wr, ex;
FPRINTF((stderr, "aioPoll(%d)\n", microSeconds));
DO_TICK();
/* get out early if there is no pending i/o and no need to relinquish cpu */
if ((maxFd == 0) && (microSeconds == 0))
return 0;
rd= rdMask;
wr= wrMask;
ex= exMask;
#ifdef BUILD_FOR_OSX
#else
if (maxFd == 0)
return 0;
#endif
ms= (int) ioMSecs();
for (;;)
{
struct timeval tv;
int n, now,why;
tv.tv_sec= microSeconds / 1000000;
tv.tv_usec= microSeconds % 1000000;
n= select(maxFd, &rd, &wr, &ex, &tv);
why = errno;
if (n > 0) break;
if (n == 0) return 0;
if (errno && (EINTR != errno))
{
fprintf(stderr, "errno %d\n", errno);
perror("select");
return 0;
}
now= (int) ioMSecs();
microSeconds -= (now - ms) * 1000;
if (microSeconds <= 0)
return 0;
ms= now;
}
for (fd= 0; fd < maxFd; ++fd)
{
# define _DO(FLAG, TYPE) \
{ \
if (FD_ISSET(fd, &TYPE)) \
{ \
aioHandler handler= TYPE##Handler[fd]; \
FD_CLR(fd, &TYPE##Mask); \
TYPE##Handler[fd]= undefinedHandler; \
handler(fd, clientData[fd], FLAG); \
} \
}
_DO_FLAG_TYPE();
# undef _DO
}
return 1;
}
