104 lines
No EOL
2.6 KiB
C#
104 lines
No EOL
2.6 KiB
C#
namespace Community.CsharpSqlite
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{
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using sqlite_u3264 = System.UInt64;
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public partial class Sqlite3
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{
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/*
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** 2008 May 27
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**
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** The author disclaims copyright to this source code. In place of
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** a legal notice, here is a blessing:
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**
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** May you do good and not evil.
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** May you find forgiveness for yourself and forgive others.
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** May you share freely, never taking more than you give.
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**
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******************************************************************************
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**
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** This file contains inline asm code for retrieving "high-performance"
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** counters for x86 class CPUs.
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**
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** $Id: hwtime.h,v 1.3 2008/08/01 14:33:15 shane Exp $
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**
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*************************************************************************
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** Included in SQLite3 port to C#-SQLite; 2008 Noah B Hart
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** C#-SQLite is an independent reimplementation of the SQLite software library
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**
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*************************************************************************
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*/
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//#if !_HWTIME_H_
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//#define _HWTIME_H_
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/*
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** The following routine only works on pentium-class (or newer) processors.
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** It uses the RDTSC opcode to read the cycle count value out of the
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** processor and returns that value. This can be used for high-res
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** profiling.
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*/
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#if ((__GNUC__) || (_MSC_VER)) && ((i386) || (__i386__) || (_M_IX86))
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#if (__GNUC__)
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__inline__ sqlite_u3264 sqlite3Hwtime(void){
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unsigned int lo, hi;
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__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi));
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return (sqlite_u3264)hi << 32 | lo;
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}
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#elif (_MSC_VER)
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__declspec(naked) __inline sqlite_u3264 __cdecl sqlite3Hwtime(void){
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__asm {
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rdtsc
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ret ; return value at EDX:EAX
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}
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}
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#endif
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#elif ((__GNUC__) && (__x86_64__))
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__inline__ sqlite_u3264 sqlite3Hwtime(void){
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unsigned long val;
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__asm__ __volatile__ ("rdtsc" : "=A" (val));
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return val;
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}
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#elif ( (__GNUC__) && (__ppc__))
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__inline__ sqlite_u3264 sqlite3Hwtime(void){
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unsigned long long retval;
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unsigned long junk;
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__asm__ __volatile__ ("\n\
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1: mftbu %1\n\
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mftb %L0\n\
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mftbu %0\n\
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cmpw %0,%1\n\
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bne 1b"
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: "=r" (retval), "=r" (junk));
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return retval;
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}
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#else
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//#error Need implementation of sqlite3Hwtime() for your platform.
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/*
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** To compile without implementing sqlite3Hwtime() for your platform,
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** you can remove the above #error and use the following
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** stub function. You will lose timing support for many
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** of the debugging and testing utilities, but it should at
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** least compile and run.
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*/
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private static sqlite_u3264 sqlite3Hwtime()
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{
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return (sqlite_u3264)System.DateTime.Now.Ticks;
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}// (sqlite_u3264)0 ); }
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#endif
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//#endif //* !_HWTIME_H_) */
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}
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} |