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Fix get_random_seed on Native Client

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Newlib in Native Client SDK does not provide ::random function.
Implement get_random_seed for NaCl using ::rand, similarly to Windows version.
This commit is contained in:
maratek 2019-08-23 15:25:56 -07:00
parent 2fb24384c9
commit 8b5ab0e4dd
1 changed files with 8 additions and 0 deletions
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8
unsupported/Eigen/CXX11/src/Tensor/TensorRandom.h
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@ -45,6 +45,14 @@ EIGEN_DEVICE_FUNC uint64_t get_random_seed() {
uint64_t rnd = ::random() ^ mach_absolute_time();
return rnd;
#elif defined __native_client__
// Same approach as for win32, except using clock_gettime
timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
int rnd1 = ::rand();
int rnd2 = ::rand();
uint64_t rnd = (rnd1 | rnd2 << 16) ^ ts.tv_nsec;
return rnd;
#else
// Augment the current time with pseudo random number generation