region_read.c

#include <clod/region.h>
#include "region_impl.h"
#include "region_file.h"
#include "error.h"
 
enum clod_region_result clod_region_read(
    struct clod_region *region,
    const int64_t *pos,
    uint8_t *,
    size_t,
    size_t *
) {
    REGION_PUBLIC_ENTER(region);
 
    mutex_lock(&region->mtx);
 
    struct region_file *rf;
    auto res = region_file_get(region, &rf, pos, false);
    if (res != CLOD_REGION_OK) {
        mutex_unlock(&region->mtx);
        REGION_PUBLIC_LEAVE(region);
        return res;
    }
 
    rwmutex_rdlock(&rf->mtx);
    mutex_unlock(&region->mtx);
 
    uint8_t *data;
    size_t size;
    res = file_get(rf->f, (void**)&data, &size);
    if (res != CLOD_REGION_OK) {
        rwmutex_rdunlock(&rf->mtx);
        REGION_PUBLIC_LEAVE(region);
        return res;
    }
 
    REGION_PUBLIC_LEAVE(region);
    return res;
}