/* mbed Microcontroller Library
 * Copyright (c) 2016 ARM Limited
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#if defined(DEVICE_TRNG) || defined(FEATURE_PSA)

#include "hal/trng_api.h"
#include "platform/SingletonPtr.h"
#include "rtos/Mutex.h"

SingletonPtr<rtos::Mutex> mbedtls_mutex;

extern "C"
int mbedtls_hardware_poll( void *data, unsigned char *output, size_t len, size_t *olen ) {
#if defined(DEVICE_TRNG)
    trng_t trng_obj;
    mbedtls_mutex->lock();
    trng_init(&trng_obj);
    int ret = trng_get_bytes(&trng_obj, output, len, olen);
    trng_free(&trng_obj);
    mbedtls_mutex->unlock();
    return ret;
#else /* defined(FEATURE_PSA) */
    mbedtls_mutex->lock();
    int ret = trng_get_bytes(NULL, output, len, olen);
    mbedtls_mutex->unlock();
    return ret;
#endif
}

#endif