mirror of https://github.com/ARMmbed/mbed-os.git
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/*
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* platform_alt.c
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*
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* Copyright (C) 2018, Arm Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#include "mbedtls/platform.h"
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#if defined(MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT)
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#include "mbed_critical.h"
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mbedtls_platform_context ctx = { { 0 } };
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int mbedtls_platform_setup( mbedtls_platform_context *unused_ctx )
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{
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int ret = 0;
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core_util_atomic_incr_u32( ( volatile uint32_t * )&ctx.reference_count, 1 );
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if( ctx.reference_count == 1 )
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{
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/* call platform specific code to setup crypto driver */
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ret = crypto_platform_setup( &ctx.platform_impl_ctx );
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}
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return ( ret );
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}
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void mbedtls_platform_teardown( mbedtls_platform_context *unused_ctx )
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{
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core_util_atomic_decr_u32( ( volatile uint32_t * )&ctx.reference_count, 1 );
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if( ctx.reference_count < 1 )
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{
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/* call platform specific code to terminate crypto driver */
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crypto_platform_terminate( &ctx.platform_impl_ctx );
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ctx.reference_count = 0;
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}
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}
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#endif /* MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT*/
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