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Nanosleep was implemented twice, removed from _sleep.c

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This commit is contained in:
Erik van der Kouwe 2009-08-16 12:55:59 +00:00
parent 3573bc1abe
commit f5421e64f8
2 changed files with 14 additions and 79 deletions
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18
lib/posix/_nanosleep.c
View File

@ -1,9 +1,10 @@
/* nanosleep() - Sleep for a number of nanoseconds. Author: Erik van der Kouwe /* nanosleep() - Sleep for a number of seconds. Author: Erik van der Kouwe
* 25 July 2009 * 25 July 2009
*/ */
#include <lib.h> #include <lib.h>
#define nanosleep _nanosleep #define nanosleep _nanosleep
#include <signal.h>
#include <unistd.h> #include <unistd.h>
#include <errno.h> #include <errno.h>
#include <time.h> #include <time.h>
@ -22,6 +23,15 @@ int nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
struct timeval timeout, timestart = { 0, 0 }, timeend; struct timeval timeout, timestart = { 0, 0 }, timeend;
int errno_select, r; int errno_select, r;
/* check parameters */
if (!rqtp)
return EFAULT;
if (rqtp->tv_sec < 0 ||
rqtp->tv_nsec < 0 ||
rqtp->tv_nsec >= NSEC_PER_SEC)
return EINVAL;
/* keep track of start time if needed */ /* keep track of start time if needed */
if (rmtp) if (rmtp)
{ {
@ -50,8 +60,7 @@ int nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
/* compute remaining time */ /* compute remaining time */
rmtp->tv_sec = rqtp->tv_sec - (timeend.tv_sec - timestart.tv_sec); rmtp->tv_sec = rqtp->tv_sec - (timeend.tv_sec - timestart.tv_sec);
rmtp->tv_nsec = rqtp->tv_nsec - rmtp->tv_nsec = rqtp->tv_nsec - (timeend.tv_usec - timestart.tv_usec) * NSEC_PER_USEC;
(timeend.tv_usec - timestart.tv_usec) * NSEC_PER_USEC;
/* bring remaining time into canonical form */ /* bring remaining time into canonical form */
while (rmtp->tv_nsec < 0) while (rmtp->tv_nsec < 0)
@ -75,3 +84,4 @@ int nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
return r; return r;
} }

75
lib/posix/_sleep.c
View File

@ -5,7 +5,6 @@
#include <lib.h> #include <lib.h>
#define sleep _sleep #define sleep _sleep
#define nanosleep _nanosleep
#include <signal.h> #include <signal.h>
#include <unistd.h> #include <unistd.h>
#include <errno.h> #include <errno.h>
@ -13,80 +12,6 @@
#include <sys/select.h> #include <sys/select.h>
#include <sys/time.h> #include <sys/time.h>
#define MSEC_PER_SEC 1000
#define USEC_PER_MSEC 1000
#define NSEC_PER_USEC 1000
#define USEC_PER_SEC (USEC_PER_MSEC * MSEC_PER_SEC)
#define NSEC_PER_SEC (NSEC_PER_USEC * USEC_PER_SEC)
int nanosleep(const struct timespec *rqtp, struct timespec *rmtp)
{
struct timeval timeout, timestart = { 0, 0 }, timeend;
int errno_select, r;
/* check parameters */
if (!rqtp)
return EFAULT;
if (rqtp->tv_sec < 0 ||
rqtp->tv_nsec < 0 ||
rqtp->tv_nsec >= NSEC_PER_SEC)
return EINVAL;
/* keep track of start time if needed */
if (rmtp)
{
rmtp->tv_sec = 0;
rmtp->tv_nsec = 0;
if (gettimeofday(&timestart, NULL) < 0)
return -1;
}
/* use select to wait */
timeout.tv_sec = rqtp->tv_sec;
timeout.tv_usec = (rqtp->tv_nsec + NSEC_PER_USEC - 1) / NSEC_PER_USEC;
r = select(0, NULL, NULL, NULL, &timeout);
/* return remaining time only if requested */
/* if select succeeded then we slept all time */
if (!rmtp || r >= 0)
return r;
/* measure end time; preserve errno */
errno_select = errno;
if (gettimeofday(&timeend, NULL) < 0)
return -1;
errno = errno_select;
/* compute remaining time */
rmtp->tv_sec = rqtp->tv_sec - (timeend.tv_sec - timestart.tv_sec);
rmtp->tv_nsec = rqtp->tv_nsec - (timeend.tv_usec - timestart.tv_usec) * NSEC_PER_USEC;
/* bring remaining time into canonical form */
while (rmtp->tv_nsec < 0)
{
rmtp->tv_sec -= 1;
rmtp->tv_nsec += NSEC_PER_SEC;
}
while (rmtp->tv_nsec > NSEC_PER_SEC)
{
rmtp->tv_sec += 1;
rmtp->tv_nsec -= NSEC_PER_SEC;
}
/* remaining time must not be negative */
if (rmtp->tv_sec < 0)
{
rmtp->tv_sec = 0;
rmtp->tv_nsec = 0;
}
return r;
}
unsigned sleep(unsigned sleep_seconds) unsigned sleep(unsigned sleep_seconds)
{ {
struct timespec rqtp, rmtp; struct timespec rqtp, rmtp;