diff options
Diffstat (limited to 'src/include/utils/sampling.h')
| -rw-r--r-- | src/include/utils/sampling.h | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/src/include/utils/sampling.h b/src/include/utils/sampling.h index a58d14281b..74ce8f9dc3 100644 --- a/src/include/utils/sampling.h +++ b/src/include/utils/sampling.h @@ -13,15 +13,14 @@ #ifndef SAMPLING_H #define SAMPLING_H +#include "common/pg_prng.h" #include "storage/block.h" /* for typedef BlockNumber */ /* Random generator for sampling code */ -typedef unsigned short SamplerRandomState[3]; - -extern void sampler_random_init_state(long seed, - SamplerRandomState randstate); -extern double sampler_random_fract(SamplerRandomState randstate); +extern void sampler_random_init_state(uint32 seed, + pg_prng_state *randstate); +extern double sampler_random_fract(pg_prng_state *randstate); /* Block sampling methods */ @@ -32,13 +31,13 @@ typedef struct int n; /* desired sample size */ BlockNumber t; /* current block number */ int m; /* blocks selected so far */ - SamplerRandomState randstate; /* random generator state */ + pg_prng_state randstate; /* random generator state */ } BlockSamplerData; typedef BlockSamplerData *BlockSampler; extern BlockNumber BlockSampler_Init(BlockSampler bs, BlockNumber nblocks, - int samplesize, long randseed); + int samplesize, uint32 randseed); extern bool BlockSampler_HasMore(BlockSampler bs); extern BlockNumber BlockSampler_Next(BlockSampler bs); @@ -47,7 +46,7 @@ extern BlockNumber BlockSampler_Next(BlockSampler bs); typedef struct { double W; - SamplerRandomState randstate; /* random generator state */ + pg_prng_state randstate; /* random generator state */ } ReservoirStateData; typedef ReservoirStateData *ReservoirState; |