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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* 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.
*/
/*
* This source contains libc overrides for the sake of stable benchmarking. If
* building a binary for the purpose of benchmarking, the object compiled from
* this source is to be injected into the list of objects-to-be-linked before
* the list of libraries-to-be-linked to ensure that the linker picks up these
* implementations.
*/
#ifdef __GNUC__
/*
* Note:
* This is nasty and dangerous. However, we only need the timeval structure
* from sys/time.h. Unfortunately, the same header also declares
* gettimeofday, which has different declarations on different platforms
* (e.g., macOS, Linux). So, instead of #ifdef'ing for platforms, we simply
* tweak the header to declare another function. Don't try this at home.
*/
#define gettimeofday __prevent_conflicting_gettimeofday_declarations__
#include <sys/time.h>
#undef gettimeofday
int gettimeofday (struct timeval *, void *);
/**
* Useless but stable gettimeofday implementation. Returns Epoch. Ensures that
* test cases relying on "now" yield stable results.
*/
int
gettimeofday (struct timeval *tv, void *tz)
{
(void) tz;
tv->tv_sec = 0;
tv->tv_usec = 0;
return 0;
} /* gettimeofday */
#endif /* __GNUC__ */
int rand (void);
/**
* Useless but stable rand implementation. Returns 4. Ensures that test cases
* relying on randomness yield stable results.
*/
int
rand (void)
{
return 4; /* Chosen by fair dice roll. Guaranteed to be random. */
} /* rand */
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