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tools.h
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tools.h
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#pragma once
#ifdef __cplusplus
extern "C" {
#endif
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <locale.h>
#include <errno.h>
#include <math.h>
#include <time.h>
#include <assert.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/file.h>
#if defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 32
# define HAS_SIGABBREV_NP
#else
# include <signal.h>
#endif
#ifdef NDEBUG
# error WTF dude? Asserts are good things!
#endif
#if CHAR_BIT != 8
# error There are not 8 bits in a char!
#endif
#define RN "\r\n"
#define INLINE inline __attribute__((always_inline))
#define UNUSED __attribute__((unused))
#define US_CALLOC(x_dest, x_nmemb) assert(((x_dest) = calloc((x_nmemb), sizeof(*(x_dest)))) != NULL)
#define US_REALLOC(x_dest, x_nmemb) assert(((x_dest) = realloc((x_dest), (x_nmemb) * sizeof(*(x_dest)))) != NULL)
#define US_DELETE(x_dest, x_free) { if (x_dest) { x_free(x_dest); } }
#define US_MEMSET_ZERO(x_obj) memset(&(x_obj), 0, sizeof(x_obj))
INLINE int US_ASPRINTF(char **strp, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int len = vsnprintf(NULL, 0, fmt, ap);
va_end(ap);
if (len < 0) {
return len;
}
*strp = (char *) malloc(len + 1);
if (!*strp) {
return -1;
}
va_start(ap, fmt);
int result = vsnprintf(*strp, len + 1, fmt, ap);
va_end(ap);
if (result != len) {
free(*strp);
return -1;
}
return len;
}
INLINE char *us_strdup(const char *str) {
char *const new_str = strdup(str);
assert(new_str != NULL);
return new_str;
}
INLINE const char *us_bool_to_string(bool flag) {
return (flag ? "true" : "false");
}
INLINE size_t us_align_size(size_t size, size_t to) {
return ((size + (to - 1)) & ~(to - 1));
}
INLINE unsigned us_min_u(unsigned a, unsigned b) {
return (a < b ? a : b);
}
INLINE unsigned us_max_u(unsigned a, unsigned b) {
return (a > b ? a : b);
}
INLINE long long us_floor_ms(long double now) {
return (long long)now - (now < (long long)now); // floor()
}
INLINE uint32_t us_triple_u32(uint32_t x) {
// https://nullprogram.com/blog/2018/07/31/
x ^= x >> 17;
x *= UINT32_C(0xED5AD4BB);
x ^= x >> 11;
x *= UINT32_C(0xAC4C1B51);
x ^= x >> 15;
x *= UINT32_C(0x31848BAB);
x ^= x >> 14;
return x;
}
INLINE void us_get_now(clockid_t clk_id, time_t *sec, long *msec) {
struct timespec ts;
assert(!clock_gettime(clk_id, &ts));
*sec = ts.tv_sec;
*msec = round(ts.tv_nsec / 1.0e6);
if (*msec > 999) {
*sec += 1;
*msec = 0;
}
}
#if defined(CLOCK_MONOTONIC_RAW)
# define _X_CLOCK_MONOTONIC CLOCK_MONOTONIC_RAW
#elif defined(CLOCK_MONOTONIC_FAST)
# define _X_CLOCK_MONOTONIC CLOCK_MONOTONIC_FAST
#else
# define _X_CLOCK_MONOTONIC CLOCK_MONOTONIC
#endif
INLINE long double us_get_now_monotonic(void) {
time_t sec;
long msec;
us_get_now(_X_CLOCK_MONOTONIC, &sec, &msec);
return (long double)sec + ((long double)msec) / 1000;
}
INLINE uint64_t us_get_now_monotonic_u64(void) {
struct timespec ts;
assert(!clock_gettime(_X_CLOCK_MONOTONIC, &ts));
return (uint64_t)(ts.tv_nsec / 1000) + (uint64_t)ts.tv_sec * 1000000;
}
#undef _X_CLOCK_MONOTONIC
INLINE uint64_t us_get_now_id(void) {
const uint64_t now = us_get_now_monotonic_u64();
return (uint64_t)us_triple_u32(now) | ((uint64_t)us_triple_u32(now + 12345) << 32);
}
INLINE long double us_get_now_real(void) {
time_t sec;
long msec;
us_get_now(CLOCK_REALTIME, &sec, &msec);
return (long double)sec + ((long double)msec) / 1000;
}
INLINE unsigned us_get_cores_available(void) {
long cores_sysconf = sysconf(_SC_NPROCESSORS_ONLN);
cores_sysconf = (cores_sysconf < 0 ? 0 : cores_sysconf);
return us_max_u(us_min_u(cores_sysconf, 4), 1);
}
INLINE void us_ld_to_timespec(long double ld, struct timespec *ts) {
ts->tv_sec = (long)ld;
ts->tv_nsec = (ld - ts->tv_sec) * 1000000000L;
if (ts->tv_nsec > 999999999L) {
ts->tv_sec += 1;
ts->tv_nsec = 0;
}
}
INLINE long double us_timespec_to_ld(const struct timespec *ts) {
return ts->tv_sec + ((long double)ts->tv_nsec) / 1000000000;
}
INLINE int us_flock_timedwait_monotonic(int fd, long double timeout) {
const long double deadline_ts = us_get_now_monotonic() + timeout;
int retval = -1;
while (true) {
retval = flock(fd, LOCK_EX | LOCK_NB);
if (retval == 0 || errno != EWOULDBLOCK || us_get_now_monotonic() > deadline_ts) {
break;
}
if (usleep(1000) < 0) {
break;
}
}
return retval;
}
INLINE char *us_errno_to_string(int error) {
locale_t locale = newlocale(LC_MESSAGES_MASK, "C", NULL);
char *buf;
if (locale) {
buf = us_strdup(strerror_l(error, locale));
freelocale(locale);
} else {
buf = us_strdup("!!! newlocale() error !!!");
}
return buf;
}
INLINE char *us_signum_to_string(int signum) {
# ifdef HAS_SIGABBREV_NP
const char *const name = sigabbrev_np(signum);
# else
const char *const name = (
signum == SIGTERM ? "TERM" :
signum == SIGINT ? "INT" :
signum == SIGPIPE ? "PIPE" :
NULL
);
# endif
char *buf = NULL;
if (name != NULL) {
US_ASPRINTF(&buf, "SIG%s", name);
} else {
US_ASPRINTF(&buf, "SIG[%d]", signum);
}
return buf;
}
#ifdef __cplusplus
}
#endif