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macos: darwin has time impl
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Signed-off-by: Ivan Prisyazhnyy <[email protected]>
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@sitano
sitano committed Aug 28, 2024
1 parent 78dfe02 commit 5afb256
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348 changes: 174 additions & 174 deletions galerautils/src/gu_time.c
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Original file line number Diff line number Diff line change
Expand Up @@ -16,179 +16,179 @@
#include <mach/mach_time.h> // mach_absolute_time, mach_timebase_info
#include <libkern/OSAtomic.h>
#include "gu_time.h"

#define NSEC_PER_SEC 1000000000
#define NSEC_PER_USEC 1000

# if defined(__LP64__)

// OS X comm page time offsets
// see http://www.opensource.apple.com/source/xnu/xnu-2050.22.13/osfmk/i386/cpu_capabilities.h
#define nt_tsc_base "0x50"
#define nt_scale "0x58"
#define nt_shift "0x5c"
#define nt_ns_base "0x60"
#define nt_generation "0x68"
#define gtod_generation "0x6c"
#define gtod_ns_base "0x70"
#define gtod_sec_base "0x78"

static inline int64_t nanotime (void) {
int64_t ntime;
__asm volatile (
"mov $0x7fffffe00000, %%rbx;" /* comm page base */
"0:" /* Loop trying to take a consistent snapshot of the time parameters. */
"movl "gtod_generation"(%%rbx), %%r8d;"
"testl %%r8d, %%r8d;"
"jz 1f;"
"movl "nt_generation"(%%rbx), %%r9d;"
"testl %%r9d, %%r9d;"
"jz 0b;"
"rdtsc;"
"movq "nt_tsc_base"(%%rbx), %%r10;"
"movl "nt_scale"(%%rbx), %%r11d;"
"movq "nt_ns_base"(%%rbx), %%r12;"
"cmpl "nt_generation"(%%rbx), %%r9d;"
"jne 0b;"
"movq "gtod_ns_base"(%%rbx), %%r13;"
"movq "gtod_sec_base"(%%rbx), %%r14;"
"cmpl "gtod_generation"(%%rbx), %%r8d;"
"jne 0b;"

/* Gathered all the data we need. Compute time. */
/* ((tsc - nt_tsc_base) * nt_scale) >> 32 + nt_ns_base - gtod_ns_base + gtod_sec_base*1e9 */
/* The multiply and shift extracts the top 64 bits of the 96-bit product. */
"shlq $32, %%rdx;"
"addq %%rdx, %%rax;"
"subq %%r10, %%rax;"
"mulq %%r11;"
"shrdq $32, %%rdx, %%rax;"
"addq %%r12, %%rax;"
"subq %%r13, %%rax;"
"imulq $1000000000, %%r14;"
"addq %%r14, %%rax;"
"jmp 2f;"
"1:" /* Fall back to system call (usually first call in this thread). */
"movq %%rsp, %%rdi;" /* rdi must be non-nil, unused */
"movq $0, %%rsi;"
"movl $(0x2000000+116), %%eax;" /* SYS_gettimeofday */
"syscall; /* may destroy rcx and r11 */"
/* sec is in rax, usec in rdx */
/* return nsec in rax */
"imulq $1000000000, %%rax;"
"imulq $1000, %%rdx;"
"addq %%rdx, %%rax;"
"2:"
: "=a"(ntime)
: /* no input parameters */
: "%rbx", "%rcx", "%rdx", "%rsi", "%rdi", "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14"
);
return ntime;
}

static inline int64_t nanouptime (void) {
int64_t ntime;
__asm volatile (
"movabs $0x7fffffe00000, %%rbx;" /* comm page base */
"0:" /* Loop trying to take a consistent snapshot of the time parameters. */
"movl "nt_generation"(%%rbx), %%r9d;"
"testl %%r9d, %%r9d;"
"jz 0b;"
"rdtsc;"
"movq "nt_tsc_base"(%%rbx), %%r10;"
"movl "nt_scale"(%%rbx), %%r11d;"
"movq "nt_ns_base"(%%rbx), %%r12;"
"cmpl "nt_generation"(%%rbx), %%r9d;"
"jne 0b;"

/* Gathered all the data we need. Compute time. */
/* ((tsc - nt_tsc_base) * nt_scale) >> 32 + nt_ns_base */
/* The multiply and shift extracts the top 64 bits of the 96-bit product. */
"shlq $32, %%rdx;"
"addq %%rdx, %%rax;"
"subq %%r10, %%rax;"
"mulq %%r11;"
"shrdq $32, %%rdx, %%rax;"
"addq %%r12, %%rax;"
: "=a"(ntime)
: /* no input parameters */
: "%rbx", "%rcx", "%rdx", "%rsi", "%rdi", "%r9", "%r10", "%r11", "%r12"
);
return ntime;
}

int
clock_gettime (clockid_t clk_id, struct timespec * tp)
{
int64_t abstime = 0;
if (tp == NULL) {
return EFAULT;
}
switch (clk_id) {
case CLOCK_REALTIME:
abstime = nanotime ();
break;
case CLOCK_MONOTONIC:
abstime = nanouptime ();
break;
default:
errno = EINVAL;
return -1;
}
tp->tv_sec = abstime / (uint64_t)NSEC_PER_SEC;
tp->tv_nsec = (uint32_t)(abstime % (uint64_t)NSEC_PER_SEC);
return 0;
}

#else /* !__LP64__ */

static struct mach_timebase_info g_mti;

int
clock_gettime (clockid_t clk_id, struct timespec * tp)
{
int64_t abstime = 0;
mach_timebase_info_data_t mti; /* {uint32_t numer, uint32_t denom} */
if (tp == NULL) {
return EFAULT;
}
switch (clk_id) {
case CLOCK_REALTIME:
struct timeval tv;
if (gettimeofday (&tv, NULL) != 0) {
return -1;
}
tp->tv_sec = tv.tv_sec;
tp->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
return 0;
case CLOCK_MONOTONIC:
abstime = mach_absolute_time ();
break;
default:
errno = EINVAL;
return -1;
}
if (g_mti.denom == 0) {
struct mach_timebase_info mti;
mach_timebase_info (&mti);
g_mti.numer = mti.numer;
OSMemoryBarrier ();
g_mti.denom = mti.denom;
}
nanos = (uint64_t)(abstime * (((double)g_mti.numer) / ((double)g_mti.denom)));
tp->tv_sec = nanos / (uint64_t)NSEC_PER_SEC;
tp->tv_nsec = (uint32_t)(nanos % (uint64_t)NSEC_PER_SEC);
return 0;
}

#endif /* !__LP64__ */

#else /* !__APPLE__ */

#ifdef __GNUC__
// error: ISO C forbids an empty translation unit
int dummy_var_gu_time;
#endif

//
// #define NSEC_PER_SEC 1000000000
// #define NSEC_PER_USEC 1000
//
// // # if defined(__LP64__)
// //
// // // OS X comm page time offsets
// // // see http://www.opensource.apple.com/source/xnu/xnu-2050.22.13/osfmk/i386/cpu_capabilities.h
// // #define nt_tsc_base "0x50"
// // #define nt_scale "0x58"
// // #define nt_shift "0x5c"
// // #define nt_ns_base "0x60"
// // #define nt_generation "0x68"
// // #define gtod_generation "0x6c"
// // #define gtod_ns_base "0x70"
// // #define gtod_sec_base "0x78"
// //
// // static inline int64_t nanotime (void) {
// // int64_t ntime;
// // __asm volatile (
// // "mov $0x7fffffe00000, %%rbx;" /* comm page base */
// // "0:" /* Loop trying to take a consistent snapshot of the time parameters. */
// // "movl "gtod_generation"(%%rbx), %%r8d;"
// // "testl %%r8d, %%r8d;"
// // "jz 1f;"
// // "movl "nt_generation"(%%rbx), %%r9d;"
// // "testl %%r9d, %%r9d;"
// // "jz 0b;"
// // "rdtsc;"
// // "movq "nt_tsc_base"(%%rbx), %%r10;"
// // "movl "nt_scale"(%%rbx), %%r11d;"
// // "movq "nt_ns_base"(%%rbx), %%r12;"
// // "cmpl "nt_generation"(%%rbx), %%r9d;"
// // "jne 0b;"
// // "movq "gtod_ns_base"(%%rbx), %%r13;"
// // "movq "gtod_sec_base"(%%rbx), %%r14;"
// // "cmpl "gtod_generation"(%%rbx), %%r8d;"
// // "jne 0b;"
// //
// // /* Gathered all the data we need. Compute time. */
// // /* ((tsc - nt_tsc_base) * nt_scale) >> 32 + nt_ns_base - gtod_ns_base + gtod_sec_base*1e9 */
// // /* The multiply and shift extracts the top 64 bits of the 96-bit product. */
// // "shlq $32, %%rdx;"
// // "addq %%rdx, %%rax;"
// // "subq %%r10, %%rax;"
// // "mulq %%r11;"
// // "shrdq $32, %%rdx, %%rax;"
// // "addq %%r12, %%rax;"
// // "subq %%r13, %%rax;"
// // "imulq $1000000000, %%r14;"
// // "addq %%r14, %%rax;"
// // "jmp 2f;"
// // "1:" /* Fall back to system call (usually first call in this thread). */
// // "movq %%rsp, %%rdi;" /* rdi must be non-nil, unused */
// // "movq $0, %%rsi;"
// // "movl $(0x2000000+116), %%eax;" /* SYS_gettimeofday */
// // "syscall; /* may destroy rcx and r11 */"
// // /* sec is in rax, usec in rdx */
// // /* return nsec in rax */
// // "imulq $1000000000, %%rax;"
// // "imulq $1000, %%rdx;"
// // "addq %%rdx, %%rax;"
// // "2:"
// // : "=a"(ntime)
// // : /* no input parameters */
// // : "%rbx", "%rcx", "%rdx", "%rsi", "%rdi", "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14"
// // );
// // return ntime;
// // }
// //
// // static inline int64_t nanouptime (void) {
// // int64_t ntime;
// // __asm volatile (
// // "movabs $0x7fffffe00000, %%rbx;" /* comm page base */
// // "0:" /* Loop trying to take a consistent snapshot of the time parameters. */
// // "movl "nt_generation"(%%rbx), %%r9d;"
// // "testl %%r9d, %%r9d;"
// // "jz 0b;"
// // "rdtsc;"
// // "movq "nt_tsc_base"(%%rbx), %%r10;"
// // "movl "nt_scale"(%%rbx), %%r11d;"
// // "movq "nt_ns_base"(%%rbx), %%r12;"
// // "cmpl "nt_generation"(%%rbx), %%r9d;"
// // "jne 0b;"
// //
// // /* Gathered all the data we need. Compute time. */
// // /* ((tsc - nt_tsc_base) * nt_scale) >> 32 + nt_ns_base */
// // /* The multiply and shift extracts the top 64 bits of the 96-bit product. */
// // "shlq $32, %%rdx;"
// // "addq %%rdx, %%rax;"
// // "subq %%r10, %%rax;"
// // "mulq %%r11;"
// // "shrdq $32, %%rdx, %%rax;"
// // "addq %%r12, %%rax;"
// // : "=a"(ntime)
// // : /* no input parameters */
// // : "%rbx", "%rcx", "%rdx", "%rsi", "%rdi", "%r9", "%r10", "%r11", "%r12"
// // );
// // return ntime;
// // }
// //
// // int
// // clock_gettime (clockid_t clk_id, struct timespec * tp)
// // {
// // int64_t abstime = 0;
// // if (tp == NULL) {
// // return EFAULT;
// // }
// // switch (clk_id) {
// // case CLOCK_REALTIME:
// // abstime = nanotime ();
// // break;
// // case CLOCK_MONOTONIC:
// // abstime = nanouptime ();
// // break;
// // default:
// // errno = EINVAL;
// // return -1;
// // }
// // tp->tv_sec = abstime / (uint64_t)NSEC_PER_SEC;
// // tp->tv_nsec = (uint32_t)(abstime % (uint64_t)NSEC_PER_SEC);
// // return 0;
// // }
// //
// // #else /* !__LP64__ */
//
// static struct mach_timebase_info g_mti;
//
// int
// clock_gettime (clockid_t clk_id, struct timespec * tp)
// {
// int64_t abstime = 0;
// mach_timebase_info_data_t mti; /* {uint32_t numer, uint32_t denom} */
// if (tp == NULL) {
// return EFAULT;
// }
// switch (clk_id) {
// case CLOCK_REALTIME:
// struct timeval tv;
// if (gettimeofday (&tv, NULL) != 0) {
// return -1;
// }
// tp->tv_sec = tv.tv_sec;
// tp->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
// return 0;
// case CLOCK_MONOTONIC:
// abstime = mach_absolute_time ();
// break;
// default:
// errno = EINVAL;
// return -1;
// }
// if (g_mti.denom == 0) {
// struct mach_timebase_info mti;
// mach_timebase_info (&mti);
// g_mti.numer = mti.numer;
// OSMemoryBarrier ();
// g_mti.denom = mti.denom;
// }
// nanos = (uint64_t)(abstime * (((double)g_mti.numer) / ((double)g_mti.denom)));
// tp->tv_sec = nanos / (uint64_t)NSEC_PER_SEC;
// tp->tv_nsec = (uint32_t)(nanos % (uint64_t)NSEC_PER_SEC);
// return 0;
// }
//
// // #endif /* !__LP64__ */
//
// #else /* !__APPLE__ */
//
// #ifdef __GNUC__
// // error: ISO C forbids an empty translation unit
// int dummy_var_gu_time;
// #endif
#endif /* __APPLE__ */

12 changes: 6 additions & 6 deletions galerautils/src/gu_time.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -54,12 +54,12 @@ gu_clock_diff (clock_t left, clock_t right)
/* Maximum date representable by long long and compatible with timespec */
#define GU_TIME_ETERNITY 9223372035999999999LL

#if defined(__APPLE__) /* synced with linux/time.h */
# define CLOCK_REALTIME 0
# define CLOCK_MONOTONIC 1
typedef int clockid_t;
int clock_gettime (clockid_t clk_id, struct timespec * tp);
#endif /* __APPLE__ */
// #if defined(__APPLE__) /* synced with linux/time.h */
// # define CLOCK_REALTIME 0
// # define CLOCK_MONOTONIC 1
// typedef int clockid_t;
// int clock_gettime (clockid_t clk_id, struct timespec * tp);
// #endif /* __APPLE__ */

static inline long long
gu_time_getres()
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