contrib/restricted/aws/s2n/utils/s2n_timer.c


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/* 
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. 
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"). 
 * You may not use this file except in compliance with the License. 
 * A copy of the License is located at 
 * 
 *  http://aws.amazon.com/apache2.0 
 * 
 * or in the "license" file accompanying this file. This file 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. 
 */ 
 
#include "utils/s2n_result.h" 
#include "utils/s2n_safety.h" 
#include "utils/s2n_timer.h" 
 
#include "tls/s2n_config.h" 
 
S2N_RESULT s2n_timer_start(struct s2n_config *config, struct s2n_timer *timer) 
{ 
    GUARD_AS_RESULT(config->monotonic_clock(config->monotonic_clock_ctx, &timer->time)); 
 
    return S2N_RESULT_OK; 
} 
 
S2N_RESULT s2n_timer_elapsed(struct s2n_config *config, struct s2n_timer *timer, uint64_t * nanoseconds) 
{ 
    uint64_t current_time; 
 
    GUARD_AS_RESULT(config->monotonic_clock(config->monotonic_clock_ctx, &current_time)); 
 
    *nanoseconds = current_time - timer->time; 
 
    return S2N_RESULT_OK; 
} 
 
S2N_RESULT s2n_timer_reset(struct s2n_config *config, struct s2n_timer *timer, uint64_t * nanoseconds) 
{ 
    uint64_t previous_time = timer->time; 
 
    GUARD_RESULT(s2n_timer_start(config, timer)); 
 
    *nanoseconds = timer->time - previous_time; 
 
    return S2N_RESULT_OK; 
}