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Call Describe functions from test cases so that we get coverage. Copied from Perforce Change: 186000 ServerID: perforce.ravenbrook.com
205 lines
6.2 KiB
C
205 lines
6.2 KiB
C
/* clock.h -- Fast clocks and timers
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*
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* Copyright (c) 2001-2014 Ravenbrook Limited. See end of file for license.
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* $Id$
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*/
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#ifndef clock_h
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#define clock_h
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#include <limits.h>
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#include "mpmtypes.h" /* for Word */
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/* EVENT_CLOCK -- fast event timestamp clock
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*
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* On platforms that support it, we want to stamp events with a very cheap
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* and fast high-resolution timer.
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*/
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/* Microsoft C provides an intrinsic for the Intel rdtsc instruction.
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<http://msdn.microsoft.com/en-US/library/twchhe95%28v=vs.100%29.aspx> */
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#if (defined(MPS_ARCH_I3) || defined(MPS_ARCH_I6)) && defined(MPS_BUILD_MV)
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typedef unsigned __int64 EventClock;
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typedef union EventClockUnion {
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struct {
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unsigned low, high;
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} half;
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unsigned __int64 whole;
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} EventClockUnion;
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#if _MSC_VER >= 1400
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#pragma intrinsic(__rdtsc)
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#define EVENT_CLOCK(lvalue) \
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BEGIN \
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(lvalue) = __rdtsc(); \
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END
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#else /* _MSC_VER < 1400 */
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/* This is mostly a patch for Open Dylan's bootstrap on Windows, which is
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using Microsoft Visual Studio 6 because of support for CodeView debugging
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information. */
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#include "mpswin.h" /* KILL IT WITH FIRE! */
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#define EVENT_CLOCK(lvalue) \
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BEGIN \
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LARGE_INTEGER _count; \
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QueryPerformanceCounter(&_count); \
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(lvalue) = _count.QuadPart; \
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END
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#endif /* _MSC_VER < 1400 */
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#if defined(MPS_ARCH_I3)
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/* We can't use a shift to get the top half of the 64-bit event clock,
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because that introduces a dependency on `__aullshr` in the C run-time. */
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#define EVENT_CLOCK_PRINT(stream, clock) \
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fprintf(stream, "%08lX%08lX", \
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(*(EventClockUnion *)&(clock)).half.high, \
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(*(EventClockUnion *)&(clock)).half.low)
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#define EVENT_CLOCK_WRITE(depth, stream, clock) \
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WriteF(depth, stream, "$W$W", \
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(*(EventClockUnion *)&(clock)).half.high, \
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(*(EventClockUnion *)&(clock)).half.low, \
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NULL)
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#elif defined(MPS_ARCH_I6)
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#if defined(MPS_BUILD_MV)
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#define EVENT_CLOCK_PRINT(stream, clock) \
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fprintf(stream, "%016llX", (clock));
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#else
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#define EVENT_CLOCK_PRINT(stream, clock) \
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fprintf(stream, "%016lX", (clock));
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#endif
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#define EVENT_CLOCK_WRITE(depth, stream, clock) \
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WriteF(depth, stream, "$W", (WriteFW)(clock), NULL)
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#endif
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#endif /* Microsoft C on Intel */
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/* If we have GCC or Clang, assemble the rdtsc instruction */
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#if !defined(EVENT_CLOCK) && \
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(defined(MPS_ARCH_I3) || defined(MPS_ARCH_I6)) && \
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(defined(MPS_BUILD_GC) || defined(MPS_BUILD_LL))
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/* Use __extension__ to enable use of a 64-bit type on 32-bit pedantic
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GCC or Clang. */
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__extension__ typedef unsigned long long EventClock;
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/* Clang provides a cross-platform builtin for a fast timer, but it
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was not available on Mac OS X 10.8 until the release of XCode 4.6.
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<http://clang.llvm.org/docs/LanguageExtensions.html#builtins> */
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#if defined(MPS_BUILD_LL)
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#if __has_builtin(__builtin_readcyclecounter)
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#define EVENT_CLOCK(lvalue) \
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BEGIN \
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(lvalue) = __builtin_readcyclecounter(); \
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END
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#endif /* __has_builtin(__builtin_readcyclecounter) */
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#endif /* Clang */
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#ifndef EVENT_CLOCK
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#define EVENT_CLOCK(lvalue) \
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BEGIN \
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unsigned _l, _h; \
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__asm__ __volatile__("rdtsc" : "=a"(_l), "=d"(_h)); \
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(lvalue) = ((EventClock)_h << 32) | _l; \
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END
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#endif
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/* The __extension__ keyword doesn't work on printf formats, so we
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concatenate two 32-bit hex numbers to print the 64-bit value. */
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#define EVENT_CLOCK_PRINT(stream, clock) \
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fprintf(stream, "%08lX%08lX", \
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(unsigned long)((clock) >> 32), \
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(unsigned long)((clock) & 0xffffffff))
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#define EVENT_CLOCK_WRITE(depth, stream, clock) \
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WriteF(depth, stream, "$W$W", (WriteFW)((clock) >> 32), (WriteFW)clock, NULL)
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#endif /* Intel, GCC or Clang */
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/* no fast clock, use plinth, probably from the C library */
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#ifndef EVENT_CLOCK
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typedef mps_clock_t EventClock;
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#define EVENT_CLOCK(lvalue) \
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BEGIN \
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(lvalue) = mps_clock(); \
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END
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#define EVENT_CLOCK_PRINT(stream, clock) \
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fprintf(stream, "%lu", (unsigned long)clock)
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#define EVENT_CLOCK_WRITE(depth, stream, clock) \
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WriteF(depth, stream, "$W", (WriteFW)clock, NULL)
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#endif
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#endif /* clock_h */
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2001-2014 Ravenbrook Limited <http://www.ravenbrook.com/>.
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* All rights reserved. This is an open source license. Contact
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* Ravenbrook for commercial licensing options.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Redistributions in any form must be accompanied by information on how
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* to obtain complete source code for this software and any accompanying
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* software that uses this software. The source code must either be
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* included in the distribution or be available for no more than the cost
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* of distribution plus a nominal fee, and must be freely redistributable
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* under reasonable conditions. For an executable file, complete source
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* code means the source code for all modules it contains. It does not
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* include source code for modules or files that typically accompany the
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* major components of the operating system on which the executable file
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* runs.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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* PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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