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Diffstat (limited to 'src/Mayaqua/Tick64.c')
| -rw-r--r-- | src/Mayaqua/Tick64.c | 378 |
1 files changed, 378 insertions, 0 deletions
diff --git a/src/Mayaqua/Tick64.c b/src/Mayaqua/Tick64.c new file mode 100644 index 00000000..91224cdf --- /dev/null +++ b/src/Mayaqua/Tick64.c @@ -0,0 +1,378 @@ +// SoftEther VPN Source Code
+// Mayaqua Kernel
+//
+// SoftEther VPN Server, Client and Bridge are free software under GPLv2.
+//
+// Copyright (c) 2012-2014 Daiyuu Nobori.
+// Copyright (c) 2012-2014 SoftEther VPN Project, University of Tsukuba, Japan.
+// Copyright (c) 2012-2014 SoftEther Corporation.
+//
+// All Rights Reserved.
+//
+// http://www.softether.org/
+//
+// Author: Daiyuu Nobori
+// Comments: Tetsuo Sugiyama, Ph.D.
+//
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// version 2 as published by the Free Software Foundation.
+//
+// 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 version 2
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+// THE LICENSE AGREEMENT IS ATTACHED ON THE SOURCE-CODE PACKAGE
+// AS "LICENSE.TXT" FILE. READ THE TEXT FILE IN ADVANCE TO USE THE SOFTWARE.
+//
+//
+// THIS SOFTWARE IS DEVELOPED IN JAPAN, AND DISTRIBUTED FROM JAPAN,
+// UNDER JAPANESE LAWS. YOU MUST AGREE IN ADVANCE TO USE, COPY, MODIFY,
+// MERGE, PUBLISH, DISTRIBUTE, SUBLICENSE, AND/OR SELL COPIES OF THIS
+// SOFTWARE, THAT ANY JURIDICAL DISPUTES WHICH ARE CONCERNED TO THIS
+// SOFTWARE OR ITS CONTENTS, AGAINST US (SOFTETHER PROJECT, SOFTETHER
+// CORPORATION, DAIYUU NOBORI OR OTHER SUPPLIERS), OR ANY JURIDICAL
+// DISPUTES AGAINST US WHICH ARE CAUSED BY ANY KIND OF USING, COPYING,
+// MODIFYING, MERGING, PUBLISHING, DISTRIBUTING, SUBLICENSING, AND/OR
+// SELLING COPIES OF THIS SOFTWARE SHALL BE REGARDED AS BE CONSTRUED AND
+// CONTROLLED BY JAPANESE LAWS, AND YOU MUST FURTHER CONSENT TO
+// EXCLUSIVE JURISDICTION AND VENUE IN THE COURTS SITTING IN TOKYO,
+// JAPAN. YOU MUST WAIVE ALL DEFENSES OF LACK OF PERSONAL JURISDICTION
+// AND FORUM NON CONVENIENS. PROCESS MAY BE SERVED ON EITHER PARTY IN
+// THE MANNER AUTHORIZED BY APPLICABLE LAW OR COURT RULE.
+//
+// USE ONLY IN JAPAN. DO NOT USE IT IN OTHER COUNTRIES. IMPORTING THIS
+// SOFTWARE INTO OTHER COUNTRIES IS AT YOUR OWN RISK. SOME COUNTRIES
+// PROHIBIT ENCRYPTED COMMUNICATIONS. USING THIS SOFTWARE IN OTHER
+// COUNTRIES MIGHT BE RESTRICTED.
+//
+//
+// DEAR SECURITY EXPERTS
+// ---------------------
+//
+// If you find a bug or a security vulnerability please kindly inform us
+// about the problem immediately so that we can fix the security problem
+// to protect a lot of users around the world as soon as possible.
+//
+// Our e-mail address for security reports is:
+// softether-vpn-security [at] softether.org
+//
+// Please note that the above e-mail address is not a technical support
+// inquiry address. If you need technical assistance, please visit
+// http://www.softether.org/ and ask your question on the users forum.
+//
+// Thank you for your cooperation.
+
+
+// Tick64.c
+// 64-bit real-time clock program
+
+#include <GlobalConst.h>
+
+#ifdef WIN32
+#include <windows.h>
+#endif // WIN32
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <stdarg.h>
+#include <locale.h>
+#include <time.h>
+#include <errno.h>
+#include <Mayaqua/Mayaqua.h>
+
+static TICK64 *tk64 = NULL;
+static EVENT *halt_tick_event = NULL;
+
+// Get the high-resolution time
+UINT64 TickHighres64()
+{
+ UINT64 ret = 0;
+
+#ifdef OS_WIN32
+
+ ret = (UINT64)(MsGetHiResTimeSpan(MsGetHiResCounter()) * 1000.0f);
+
+#else // OS_WIN32
+
+ return Tick64();
+
+#endif // OS_WIN32
+
+ return ret;
+}
+
+// Convert the Tick value to time
+UINT64 Tick64ToTime64(UINT64 tick)
+{
+ UINT64 ret = 0;
+ if (tick == 0)
+ {
+ return 0;
+ }
+ LockList(tk64->AdjustTime);
+ {
+ UINT i;
+ for (i = 0;i < LIST_NUM(tk64->AdjustTime);i++)
+ {
+ ADJUST_TIME *t = LIST_DATA(tk64->AdjustTime, i);
+ if (t->Tick <= tick)
+ {
+ ret = t->Time + (tick - t->Tick);
+ }
+ }
+ }
+ UnlockList(tk64->AdjustTime);
+ if (ret == 0)
+ {
+ ret++;
+ }
+ return ret;
+}
+
+// Convert the Tick value to time
+UINT64 TickToTime(UINT64 tick)
+{
+ return Tick64ToTime64(tick);
+}
+
+// Get the Tick value
+UINT64 Tick64()
+{
+#ifdef OS_WIN32
+ return Win32FastTick64();
+#else // OS_WIN32
+ UINT64 tick64;
+ if (tk64 == NULL)
+ {
+ return 0;
+ }
+ Lock(tk64->TickLock);
+ {
+ tick64 = tk64->Tick;
+ }
+ Unlock(tk64->TickLock);
+ return tick64;
+#endif // OS_WIN32
+}
+
+// Real-time clock measuring thread
+void Tick64Thread(THREAD *thread, void *param)
+{
+ UINT n = 0;
+ bool first = false;
+ bool create_first_entry = true;
+ UINT tick_span;
+ // Validate arguments
+ if (thread == NULL)
+ {
+ return;
+ }
+
+#ifdef OS_WIN32
+
+ // Raise the priority of the Win32 thread
+ MsSetThreadPriorityRealtime();
+
+ tick_span = TICK64_SPAN_WIN32;
+
+#else // OS_WIN32
+
+ // Raise the priority of a POSIX threads
+ UnixSetThreadPriorityRealtime();
+
+ tick_span = TICK64_SPAN;
+
+#endif // OS_WIN32
+
+ while (true)
+ {
+ UINT tick;
+ UINT64 tick64;
+
+#ifndef OS_WIN32
+ tick = TickRealtime(); // Get the current system clock
+
+ if (tk64->LastTick > tick)
+ {
+ if ((tk64->LastTick - tick) >= (UINT64)0x0fffffff)
+ {
+ // The Tick has gone lap around
+ tk64->RoundCount++;
+ }
+ else
+ {
+ // tick skewed (System administrator might change hardware clock)
+ // Normally, the clock skew appears as sub-seconds error
+ tick = tk64->LastTick;
+ }
+ }
+ tk64->LastTick = tick;
+
+ tick64 = (UINT64)tk64->RoundCount * (UINT64)4294967296LL + (UINT64)tick;
+
+ Lock(tk64->TickLock);
+ {
+ if (tk64->TickStart == 0)
+ {
+ tk64->TickStart = tick64;
+ }
+ tick64 = tk64->Tick = tick64 - tk64->TickStart + (UINT64)1;
+ }
+ Unlock(tk64->TickLock);
+#else // OS_WIN32
+ tick64 = Win32FastTick64();
+ tick = (UINT)tick64;
+#endif // OS_WIN32
+
+ if (create_first_entry)
+ {
+ ADJUST_TIME *t = ZeroMalloc(sizeof(ADJUST_TIME));
+ t->Tick = tick64;
+ t->Time = SystemTime64();
+ tk64->Tick64WithTime64 = tick64;
+ tk64->Time64 = t->Time;
+ Add(tk64->AdjustTime, t);
+
+ // Notify the completion of the initialization
+ NoticeThreadInit(thread);
+ create_first_entry = false;
+ }
+
+ // Time correction
+ n += tick_span;
+ if (n >= 1000 || first == false)
+ {
+ UINT64 now = SystemTime64();
+
+ if (now < tk64->Time64 ||
+ Diff64((now - tk64->Time64) + tk64->Tick64WithTime64, tick64) >= tick_span)
+ {
+ ADJUST_TIME *t = ZeroMalloc(sizeof(ADJUST_TIME));
+ LockList(tk64->AdjustTime);
+ {
+ t->Tick = tick64;
+ t->Time = now;
+ Add(tk64->AdjustTime, t);
+ Debug("Adjust Time: Tick = %I64u, Time = %I64u\n",
+ t->Tick, t->Time);
+
+ // To prevent consuming memory infinite on a system that clock is skewd
+ if (LIST_NUM(tk64->AdjustTime) > MAX_ADJUST_TIME)
+ {
+ // Remove the second
+ ADJUST_TIME *t2 = LIST_DATA(tk64->AdjustTime, 1);
+
+ Delete(tk64->AdjustTime, t2);
+
+ Debug("NUM_ADJUST TIME: %u\n", LIST_NUM(tk64->AdjustTime));
+
+ Free(t2);
+ }
+ }
+ UnlockList(tk64->AdjustTime);
+ tk64->Time64 = now;
+ tk64->Tick64WithTime64 = tick64;
+ }
+ first = true;
+ n = 0;
+ }
+
+ if (tk64->Halt)
+ {
+ break;
+ }
+
+#ifdef OS_WIN32
+ Wait(halt_tick_event, tick_span);
+#else // OS_WIN32
+ SleepThread(tick_span);
+#endif // OS_WIN32
+ }
+}
+
+// Get the absolute value of the difference between the two 64 bit integers
+UINT64 Diff64(UINT64 a, UINT64 b)
+{
+ if (a > b)
+ {
+ return a - b;
+ }
+ else
+ {
+ return b - a;
+ }
+}
+
+// Initialization of the Tick64
+void InitTick64()
+{
+ if (tk64 != NULL)
+ {
+ // Already initialized
+ return;
+ }
+
+ halt_tick_event = NewEvent();
+
+ // Initialize the structure
+ tk64 = ZeroMalloc(sizeof(TICK64));
+ tk64->TickLock = NewLock();
+ tk64->AdjustTime = NewList(NULL);
+
+ // Creating a thread
+ tk64->Thread = NewThread(Tick64Thread, NULL);
+ WaitThreadInit(tk64->Thread);
+}
+
+// Release of the Tick64
+void FreeTick64()
+{
+ UINT i;
+ if (tk64 == NULL)
+ {
+ // Uninitialized
+ return;
+ }
+
+ // Termination process
+ tk64->Halt = true;
+ Set(halt_tick_event);
+ WaitThread(tk64->Thread, INFINITE);
+ ReleaseThread(tk64->Thread);
+
+ // Releasing process
+ for (i = 0;i < LIST_NUM(tk64->AdjustTime);i++)
+ {
+ ADJUST_TIME *t = LIST_DATA(tk64->AdjustTime, i);
+ Free(t);
+ }
+ ReleaseList(tk64->AdjustTime);
+ DeleteLock(tk64->TickLock);
+ Free(tk64);
+ tk64 = NULL;
+
+ ReleaseEvent(halt_tick_event);
+ halt_tick_event = NULL;
+}
+
+
+// Developed by SoftEther VPN Project at University of Tsukuba in Japan.
+// Department of Computer Science has dozens of overly-enthusiastic geeks.
+// Join us: http://www.tsukuba.ac.jp/english/admission/
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