diff --git a/library/timing.c b/library/timing.c
new file mode 100644
index 0000000..49fe7f3
--- /dev/null
+++ b/library/timing.c
@@ -0,0 +1,250 @@
+/*
+ *  Portable interface to the CPU cycle counter
+ *
+ *  Copyright (C) 2006-2007  Christophe Devine
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "xyssl/config.h"
+
+#if defined(XYSSL_TIMING_C)
+
+#include "xyssl/timing.h"
+
+#if defined(WIN32)
+
+#include <windows.h>
+#include <winbase.h>
+
+struct _hr_time
+{
+    LARGE_INTEGER start;
+};
+
+#else
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <signal.h>
+#include <time.h>
+
+struct _hr_time
+{
+    struct timeval start;
+};
+
+#endif
+
+#if (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
+
+unsigned long hardclock( void )
+{
+    unsigned long tsc;
+    __asm   rdtsc
+    __asm   mov  [tsc], eax
+    return( tsc );
+}
+
+#else
+#if defined(__GNUC__) && defined(__i386__)
+
+unsigned long hardclock( void )
+{
+    unsigned long tsc;
+    asm( "rdtsc" : "=a" (tsc) );
+    return( tsc );
+}
+
+#else
+#if defined(__GNUC__) && (defined(__amd64__) || defined(__x86_64__))
+
+unsigned long hardclock( void )
+{
+    unsigned long lo, hi;
+    asm( "rdtsc" : "=a" (lo), "=d" (hi) ); 
+    return( lo | (hi << 32) );
+}
+
+#else
+#if defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
+
+unsigned long hardclock( void )
+{
+    unsigned long tbl, tbu0, tbu1;
+
+    do
+    {
+        asm( "mftbu %0" : "=r" (tbu0) );
+        asm( "mftb  %0" : "=r" (tbl ) );
+        asm( "mftbu %0" : "=r" (tbu1) );
+    }
+    while( tbu0 != tbu1 );
+
+    return( tbl );
+}
+
+#else
+#if defined(__GNUC__) && defined(__sparc__)
+
+unsigned long hardclock( void )
+{
+    unsigned long tick;
+    asm( ".byte 0x83, 0x41, 0x00, 0x00" );
+    asm( "mov   %%g1, %0" : "=r" (tick) );
+    return( tick );
+}
+
+#else
+#if defined(__GNUC__) && defined(__alpha__)
+
+unsigned long hardclock( void )
+{
+    unsigned long cc;
+    asm( "rpcc %0" : "=r" (cc) );
+    return( cc & 0xFFFFFFFF );
+}
+
+#else
+#if defined(__GNUC__) && defined(__ia64__)
+
+unsigned long hardclock( void )
+{
+    unsigned long itc;
+    asm( "mov %0 = ar.itc" : "=r" (itc) );
+    return( itc );
+}
+
+#else
+
+static int hardclock_init = 0;
+static struct timeval tv_init;
+
+unsigned long hardclock( void )
+{
+    struct timeval tv_cur;
+
+    if( hardclock_init == 0 )
+    {
+        gettimeofday( &tv_init, NULL );
+        hardclock_init = 1;
+    }
+
+    gettimeofday( &tv_cur, NULL );
+    return( ( tv_cur.tv_sec  - tv_init.tv_sec  ) * 1000000
+          + ( tv_cur.tv_usec - tv_init.tv_usec ) );
+}
+
+#endif /* generic */
+#endif /* IA-64   */
+#endif /* Alpha   */
+#endif /* SPARC8  */
+#endif /* PowerPC */
+#endif /* AMD64   */
+#endif /* i586+   */
+
+int alarmed = 0;
+
+#if defined(WIN32)
+
+unsigned long get_timer( struct hr_time *val, int reset )
+{
+    unsigned long delta;
+    LARGE_INTEGER offset, hfreq;
+    struct _hr_time *t = (struct _hr_time *) val;
+
+    QueryPerformanceCounter(  &offset );
+    QueryPerformanceFrequency( &hfreq );
+
+    delta = (unsigned long)( ( 1000 *
+        ( offset.QuadPart - t->start.QuadPart ) ) /
+           hfreq.QuadPart );
+
+    if( reset )
+        QueryPerformanceCounter( &t->start );
+
+    return( delta );
+}
+
+DWORD WINAPI TimerProc( LPVOID uElapse )
+{   
+    Sleep( (DWORD) uElapse );
+    alarmed = 1; 
+    return( TRUE );
+}
+
+void set_alarm( int seconds )
+{   
+    DWORD ThreadId;
+
+    alarmed = 0; 
+    CloseHandle( CreateThread( NULL, 0, TimerProc,
+        (LPVOID) ( seconds * 1000 ), 0, &ThreadId ) );
+}
+
+void m_sleep( int milliseconds )
+{
+    Sleep( milliseconds );
+}
+
+#else
+
+unsigned long get_timer( struct hr_time *val, int reset )
+{
+    unsigned long delta;
+    struct timeval offset;
+    struct _hr_time *t = (struct _hr_time *) val;
+
+    gettimeofday( &offset, NULL );
+
+    delta = ( offset.tv_sec  - t->start.tv_sec  ) * 1000
+          + ( offset.tv_usec - t->start.tv_usec ) / 1000;
+
+    if( reset )
+    {
+        t->start.tv_sec  = offset.tv_sec;
+        t->start.tv_usec = offset.tv_usec;
+    }
+
+    return( delta );
+}
+
+static void sighandler( int signum )
+{   
+    alarmed = 1;
+    signal( signum, sighandler );
+}
+
+void set_alarm( int seconds )
+{
+    alarmed = 0;
+    signal( SIGALRM, sighandler );
+    alarm( seconds );
+}
+
+void m_sleep( int milliseconds )
+{
+    struct timeval tv;
+
+    tv.tv_sec  = milliseconds / 1000;
+    tv.tv_usec = milliseconds * 1000;
+
+    select( 0, NULL, NULL, NULL, &tv );
+}
+
+#endif
+
+#endif