8 #include <botan/internal/hres_timer.h>
9 #include <botan/cpuid.h>
10 #include <botan/time.h>
12 #if defined(BOTAN_TARGET_OS_IS_WINDOWS)
24 #if defined(BOTAN_TARGET_OS_IS_WINDOWS)
27 ::QueryPerformanceCounter(&tv);
28 accum.
add(tv.QuadPart, 0);
32 #if defined(BOTAN_TARGET_OS_HAS_CLOCK_GETTIME)
34 #define CLOCK_POLL(src) \
37 clock_gettime(src, &ts); \
38 accum.add(&ts, sizeof(ts), 0); \
41 #if defined(CLOCK_REALTIME)
42 CLOCK_POLL(CLOCK_REALTIME);
45 #if defined(CLOCK_MONOTONIC)
46 CLOCK_POLL(CLOCK_MONOTONIC);
49 #if defined(CLOCK_MONOTONIC_RAW)
50 CLOCK_POLL(CLOCK_MONOTONIC_RAW);
53 #if defined(CLOCK_PROCESS_CPUTIME_ID)
54 CLOCK_POLL(CLOCK_PROCESS_CPUTIME_ID);
57 #if defined(CLOCK_THREAD_CPUTIME_ID)
58 CLOCK_POLL(CLOCK_THREAD_CPUTIME_ID);
65 #if BOTAN_USE_GCC_INLINE_ASM
69 #if defined(BOTAN_TARGET_CPU_IS_X86_FAMILY)
72 u32bit rtc_low = 0, rtc_high = 0;
73 asm volatile(
"rdtsc" :
"=d" (rtc_high),
"=a" (rtc_low));
74 rtc = (
static_cast<u64bit>(rtc_high) << 32) | rtc_low;
77 #elif defined(BOTAN_TARGET_CPU_IS_PPC_FAMILY)
78 u32bit rtc_low = 0, rtc_high = 0;
79 asm volatile(
"mftbu %0; mftb %1" :
"=r" (rtc_high),
"=r" (rtc_low));
80 rtc = (
static_cast<u64bit>(rtc_high) << 32) | rtc_low;
82 #elif defined(BOTAN_TARGET_ARCH_IS_ALPHA)
83 asm volatile(
"rpcc %0" :
"=r" (rtc));
85 #elif defined(BOTAN_TARGET_ARCH_IS_SPARC64) && !defined(BOTAN_TARGET_OS_IS_OPENBSD)
86 asm volatile(
"rd %%tick, %0" :
"=r" (rtc));
88 #elif defined(BOTAN_TARGET_ARCH_IS_IA64)
89 asm volatile(
"mov %0=ar.itc" :
"=r" (rtc));
91 #elif defined(BOTAN_TARGET_ARCH_IS_S390X)
92 asm volatile(
"stck 0(%0)" : :
"a" (&rtc) :
"memory",
"cc");
94 #elif defined(BOTAN_TARGET_ARCH_IS_HPPA)
95 asm volatile(
"mfctl 16,%0" :
"=r" (rtc));
void add(const void *bytes, size_t length, double entropy_bits_per_byte)
unsigned long long u64bit
void poll(Entropy_Accumulator &accum)