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Introduce clock_nanosleep()

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This commit is contained in:
Justine Tunney 2022-10-05 06:37:15 -07:00
parent fe3216e961
commit b75a4654cf
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GPG key ID: BE714B4575D6E328
33 changed files with 553 additions and 100 deletions
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2
libc/intrin/describeflags.internal.h
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@ -50,6 +50,7 @@ const char *DescribeRemapFlags(char[48], int);
const char *DescribeRlimitName(char[20], int);
const char *DescribeSchedPolicy(char[48], int);
const char *DescribeSeccompOperation(int);
const char *DescribeSleepFlags(char[16], int);
const char *DescribeSockLevel(char[12], int);
const char *DescribeSockOptname(char[32], int, int);
const char *DescribeSocketFamily(char[12], int);
@ -92,6 +93,7 @@ const char *DescribeWhence(char[12], int);
#define DescribeRemapFlags(x) DescribeRemapFlags(alloca(48), x)
#define DescribeRlimitName(rl) DescribeRlimitName(alloca(20), rl)
#define DescribeSchedPolicy(x) DescribeSchedPolicy(alloca(48), x)
#define DescribeSleepFlags(x) DescribeSleepFlags(alloca(16), x)
#define DescribeSockLevel(x) DescribeSockLevel(alloca(12), x)
#define DescribeSockOptname(x, y) DescribeSockOptname(alloca(32), x, y)
#define DescribeSocketFamily(x) DescribeSocketFamily(alloca(12), x)

36
libc/intrin/timespec2timeval.c → libc/intrin/describesleepflags.c
View file

@ -16,30 +16,22 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/struct/timespec.h"
#include "libc/dce.h"
#include "libc/fmt/conv.h"
// we don't want instrumentation because:
// - nanosleep() depends on this and ftrace can take microsecs
#include "libc/fmt/itoa.h"
#include "libc/fmt/magnumstrs.internal.h"
#include "libc/intrin/describeflags.internal.h"
#include "libc/sysv/consts/timer.h"
/**
* Converts `struct timespec` to `struct timeval`.
*
* This divides ts.tv_nsec by 1000 with upward rounding and overflow
* handling. Your ts.tv_nsec must be on the interval `[0,1000000000)`
* otherwise `{-1, -1}` is returned.
*
* @return converted timeval whose tv_usec will be -1 on error
* Describes clock_nanosleep() flags argument.
*/
noinstrument struct timeval _timespec2timeval(struct timespec ts) {
if (0 <= ts.tv_nsec && ts.tv_nsec < 1000000000) {
if (0 <= ts.tv_nsec && ts.tv_nsec < 1000000000 - 999) {
return (struct timeval){ts.tv_sec, (ts.tv_nsec + 999) / 1000};
} else {
return (struct timeval){ts.tv_sec + 1, 0};
}
} else {
return (struct timeval){-1, -1};
const char *(DescribeSleepFlags)(char buf[16], int x) {
switch (x) {
case 0:
return "0";
case TIMER_ABSTIME:
return "TIMER_ABSTIME";
default:
FormatInt32(buf, x);
return buf;
}
}