19 #ifndef GRPC_CORE_LIB_GPR_TIME_PRECISE_H
20 #define GRPC_CORE_LIB_GPR_TIME_PRECISE_H
34 #if GPR_CYCLE_COUNTER_RDTSC_32
35 typedef int64_t gpr_cycle_counter;
36 inline gpr_cycle_counter gpr_get_cycle_counter() {
38 __asm__
volatile(
"rdtsc" :
"=A"(ret));
41 #elif GPR_CYCLE_COUNTER_RDTSC_64
42 typedef int64_t gpr_cycle_counter;
43 inline gpr_cycle_counter gpr_get_cycle_counter() {
45 __asm__
volatile(
"rdtsc" :
"=a"(low),
"=d"(high));
46 return (high << 32) | low;
48 #elif GPR_CYCLE_COUNTER_FALLBACK
52 typedef double gpr_cycle_counter;
53 gpr_cycle_counter gpr_get_cycle_counter();
55 #error Must define exactly one of \
56 GPR_CYCLE_COUNTER_RDTSC_32, \
57 GPR_CYCLE_COUNTER_RDTSC_64, or \
58 GPR_CYCLE_COUNTER_FALLBACK
Analogous to struct timespec.
Definition: gpr_types.h:47
gpr_timespec gpr_cycle_counter_to_time(gpr_cycle_counter cycles)
void gpr_precise_clock_now(gpr_timespec *clk)
void gpr_precise_clock_init(void)
gpr_timespec gpr_cycle_counter_sub(gpr_cycle_counter a, gpr_cycle_counter b)