include/al/random.h


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#ifndef _AL_RANDOM_H
#define _AL_RANDOM_H

#include "lib.h"
#include "macros.h"

#define AL_RAND_MAX RAND_MAX

extern u32 al_rand_seed;
extern __thread bool al_rand_set;

static inline void al_rand_init(u32 seed)
{
    al_rand_seed = seed;
}

static inline s32 al_rand(void)
{
    if (UNLIKELY(!al_rand_set)) {
        // srand() is thread-local in Windows CRT.
        srand(al_rand_seed);
        al_rand_set = true;
    }
    return rand();
}

#endif // _AL_RANDOM_H