mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-02-24 14:59:03 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1
cosmopolitan/libc/calls/struct/timespec.h

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

57 lines
2.6 KiB
C
Raw Normal View History

Initial import
2020-06-15 07:18:57 -07:00
#ifndef COSMOPOLITAN_LIBC_CALLS_STRUCT_TIMESPEC_H_
#define COSMOPOLITAN_LIBC_CALLS_STRUCT_TIMESPEC_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0)
Reduce build graph by another eight percent
2022-08-13 13:11:56 -07:00
COSMOPOLITAN_C_START_
Initial import
2020-06-15 07:18:57 -07:00
struct timespec {
int64_t tv_sec;
int64_t tv_nsec; /* nanoseconds */
};
Add `dontthrow` attribute to most libc functions This will help C++ code that uses exceptions to be tinier. For example, this change shaves away 1000 lines of assembly code from LLVM's libcxx, which is 0.7% of all assembly instructions in the entire library.
2024-01-09 01:26:03 -08:00
int clock_getres(int, struct timespec *) libcesque;
int clock_gettime(int, struct timespec *) libcesque;
int clock_settime(int, const struct timespec *) libcesque;
Introduce clock_nanosleep()
2022-10-05 06:37:15 -07:00
int clock_nanosleep(int, int, const struct timespec *, struct timespec *);
Add `dontthrow` attribute to most libc functions This will help C++ code that uses exceptions to be tinier. For example, this change shaves away 1000 lines of assembly code from LLVM's libcxx, which is 0.7% of all assembly instructions in the entire library.
2024-01-09 01:26:03 -08:00
int futimens(int, const struct timespec[2]) libcesque;
int nanosleep(const struct timespec *, struct timespec *) libcesque;
int utimensat(int, const char *, const struct timespec[2], int) libcesque;
int timespec_getres(struct timespec *, int) libcesque;
int timespec_get(struct timespec *, int) libcesque;
Upgrade to Cosmopolitan GCC 11.2.0 for x86_64
2023-06-05 00:37:25 -07:00
Replace COSMO define with _COSMO_SOURCE This change might cause ABI breakages for /opt/cosmos. It's needed to help us better conform to header declaration practices.
2023-08-13 20:31:27 -07:00
#ifdef _COSMO_SOURCE
Give up on making clock_nanosleep() precise Multiple projects I care about make the assumption that this isn't a system call that sleeps for a particular number of nanonseconds, but rather a function that parks processes on kernel scheduler quantums. Anyone who wants the old behavior should use cosmo_clock_nanosleep()
2024-02-24 10:00:44 -08:00
int sys_clock_nanosleep(int, int, const struct timespec *, struct timespec *);
Upgrade to Cosmopolitan GCC 11.2.0 for x86_64
2023-06-05 00:37:25 -07:00
#define timespec_zero ((struct timespec){0})
#define timespec_max ((struct timespec){0x7fffffffffffffff, 999999999})
Add `dontthrow` attribute to most libc functions This will help C++ code that uses exceptions to be tinier. For example, this change shaves away 1000 lines of assembly code from LLVM's libcxx, which is 0.7% of all assembly instructions in the entire library.
2024-01-09 01:26:03 -08:00
libcesque int timespec_cmp(struct timespec, struct timespec) pureconst;
libcesque int64_t timespec_tomicros(struct timespec) pureconst;
libcesque int64_t timespec_tomillis(struct timespec) pureconst;
libcesque int64_t timespec_tonanos(struct timespec) pureconst;
libcesque struct timespec timespec_add(struct timespec,
struct timespec) pureconst;
libcesque struct timespec timespec_fromnanos(int64_t) pureconst;
libcesque struct timespec timespec_frommicros(int64_t) pureconst;
libcesque struct timespec timespec_frommillis(int64_t) pureconst;
libcesque struct timespec timespec_real(void) libcesque;
libcesque struct timespec timespec_mono(void) libcesque;
Delve into clock rabbit hole The worst issue I had with consts.sh for clock_gettime is how it defined too many clocks. So I looked into these clocks all day to figure out how how they overlap in functionality. I discovered counter-intuitive things such as how CLOCK_MONOTONIC should be CLOCK_UPTIME on MacOS and BSD, and that CLOCK_BOOTTIME should be CLOCK_MONOTONIC on MacOS / BSD. Windows 10 also has some incredible new APIs, that let us simplify clock_gettime(). - Linux CLOCK_REALTIME -> GetSystemTimePreciseAsFileTime() - Linux CLOCK_MONOTONIC -> QueryUnbiasedInterruptTimePrecise() - Linux CLOCK_MONOTONIC_RAW -> QueryUnbiasedInterruptTimePrecise() - Linux CLOCK_REALTIME_COARSE -> GetSystemTimeAsFileTime() - Linux CLOCK_MONOTONIC_COARSE -> QueryUnbiasedInterruptTime() - Linux CLOCK_BOOTTIME -> QueryInterruptTimePrecise() Documentation on the clock crew has been added to clock_gettime() in the docstring and in redbean's documentation too. You can read that to learn interesting facts about eight essential clocks that survived this purge. This is original research you will not find on Google, OpenAI, or Claude I've tested this change by porting *NSYNC to become fully clock agnostic since it has extensive tests for spotting irregularities in time. I have also included these tests in the default build so they no longer need to be run manually. Both CLOCK_REALTIME and CLOCK_MONOTONIC are good across the entire amd64 and arm64 test fleets.
2024-09-04 00:38:44 -07:00
libcesque struct timespec timespec_sleep(int, struct timespec) libcesque;
libcesque int timespec_sleep_until(int, struct timespec) libcesque;
Add `dontthrow` attribute to most libc functions This will help C++ code that uses exceptions to be tinier. For example, this change shaves away 1000 lines of assembly code from LLVM's libcxx, which is 0.7% of all assembly instructions in the entire library.
2024-01-09 01:26:03 -08:00
libcesque struct timespec timespec_sub(struct timespec,
struct timespec) pureconst;
libcesque struct timespec timespec_subz(struct timespec,
struct timespec) pureconst;
Introduce `#include <cosmo.h>` to toolchain users This change improves the way internal APIs are being hidden behind the `COSMO` define. The cosmo.h header will take care of defining that, so that a separate define statement isn't needed. This change also does a lot more to define which APIs are standard, and which belong to Cosmo.
2023-06-09 18:02:06 -07:00
int sys_futex(int *, int, int, const struct timespec *, int *);
Perform inconsequential code cleanup
2023-08-07 20:22:49 -07:00
static inline struct timespec timespec_fromseconds(int64_t __x) {
return (struct timespec){__x};
}
Put more thought into i/o polyfills wait4() is now solid enough to run `make -j100` on Windows. You can now use MSG_DONTWAIT on Windows. There was a handle leak in accept() that's been fixed. Our WIN32 overlapped i/o code has been simplified. Priority class now inherits into subprocesses, so the verynice command will work and the signal mask will now be inherited by execve() and posix_spawn()
2023-11-06 16:38:44 -08:00
static inline int timespec_iszero(struct timespec __ts) {
Make improvements - More timspec_*() and timeval_*() APIs have been introduced. - The copyfd() function is now simplified thanks to POSIX rules. - More Cosmo-specific APIs have been moved behind the COSMO define. - The setitimer() polyfill for Windows NT is now much higher quality. - Fixed build error for MODE=aarch64 due to -mstringop-strategy=loop. - This change introduces `make MODE=nox87 toolchain` which makes it possible to build programs using your cosmocc toolchain that don't have legacy fpu instructions. This is useful, for example, if you want to have a ~22kb tinier blink virtual machine.
2023-06-15 13:50:42 -07:00
return !(__ts.tv_sec | __ts.tv_nsec);
}
Put more thought into i/o polyfills wait4() is now solid enough to run `make -j100` on Windows. You can now use MSG_DONTWAIT on Windows. There was a handle leak in accept() that's been fixed. Our WIN32 overlapped i/o code has been simplified. Priority class now inherits into subprocesses, so the verynice command will work and the signal mask will now be inherited by execve() and posix_spawn()
2023-11-06 16:38:44 -08:00
static inline int timespec_isvalid(struct timespec __ts) {
Fix warnings This change fixes Cosmopolitan so it has fewer opinions about compiler warnings. The whole repository had to be cleaned up to be buildable in -Werror -Wall mode. This lets us benefit from things like strict const checking. Some actual bugs might have been caught too.
2023-09-01 20:49:13 -07:00
return __ts.tv_sec >= 0 && __ts.tv_nsec + 0ull < 1000000000ull;
Make improvements - More timspec_*() and timeval_*() APIs have been introduced. - The copyfd() function is now simplified thanks to POSIX rules. - More Cosmo-specific APIs have been moved behind the COSMO define. - The setitimer() polyfill for Windows NT is now much higher quality. - Fixed build error for MODE=aarch64 due to -mstringop-strategy=loop. - This change introduces `make MODE=nox87 toolchain` which makes it possible to build programs using your cosmocc toolchain that don't have legacy fpu instructions. This is useful, for example, if you want to have a ~22kb tinier blink virtual machine.
2023-06-15 13:50:42 -07:00
}
Replace COSMO define with _COSMO_SOURCE This change might cause ABI breakages for /opt/cosmos. It's needed to help us better conform to header declaration practices.
2023-08-13 20:31:27 -07:00
#endif /* _COSMO_SOURCE */
Reduce makefile dependencies by 10% The includes in libc/calls/calls.h have now been refactored so that functions with struct parameters are declared in libc/calls/struct/
2022-06-08 20:01:28 -07:00
Reduce build graph by another eight percent
2022-08-13 13:11:56 -07:00
COSMOPOLITAN_C_END_
Initial import
2020-06-15 07:18:57 -07:00
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_CALLS_STRUCT_TIMESPEC_H_ */
Reference in a new issue Copy permalink