#include "portable.h"
#include "common.h"
#include <time.h>

int64_t portable_now_ms(void){
    struct timespec ts;
    if(clock_gettime(CLOCK_MONOTONIC, &ts)!=0){
        /* CLOCK_MONOTONIC always present on Pi5 kernel 6.x; fallback guard */
        clock_gettime(CLOCK_REALTIME, &ts);
    }
    return (int64_t)ts.tv_sec*1000 + ts.tv_nsec/1000000;
}

void portable_sleep_ms(int ms){
    if(ms<=0) return;
    struct timespec req, rem;
    req.tv_sec  = ms/1000;
    req.tv_nsec = (long)(ms%1000)*1000000L;
    while(nanosleep(&req,&rem)==-1 && errno==EINTR){ req=rem; req.tv_nsec%=1000000000L; }
}

int portable_thread_create(pthread_t *t, void*(*fn)(void*), void*arg, size_t stack_bytes){
    pthread_attr_t attr;
    if(pthread_attr_init(&attr)!=0) return FAILURE;
    if(stack_bytes>0){
        size_t ps = sysconf(_SC_PAGESIZE); if(ps<1) ps=4096;
        size_t st = (stack_bytes + ps-1) & ~(size_t)(ps-1);
        if(st < (size_t)PTHREAD_STACK_MIN) st = (size_t)PTHREAD_STACK_MIN;
        if(pthread_attr_setstacksize(&attr, st)!=0){ pthread_attr_destroy(&attr); return FAILURE; }
    }
    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
    int rc = pthread_create(t,&attr,fn,arg);
    pthread_attr_destroy(&attr);
    return rc==0?SUCCESS:FAILURE;
}