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Code Issues Releases Wiki Activity

Replaced time_ms() with a threadsafe and non-overflowing cTimeMs

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This commit is contained in:
Klaus Schmidinger 2004-12-19 18:08:09 +01:00
parent ce8369251c
commit c49253824a
8 changed files with 75 additions and 46 deletions
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1
CONTRIBUTORS
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@ -350,6 +350,7 @@ Rainer Zocholl <vdrcontrib@zocki.toppoint.de>
for reporting a possible race condition in generating the DVB device names
for pointing out that non-threadsafe functions should be replaced with their
threadsafe versions
for pointing out a threadsafe and overflow problem with time_ms()
Oleg Assovski <assen@bitcom.msk.ru>
for adding EPG scanning for another 4 days

2
HISTORY
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@ -3222,3 +3222,5 @@ Video Disk Recorder Revision History
WeekDayName() -> cWeekDayName
DayDateTime() -> cDayDateTime
- Removed delay_ms(), using cCondWait::SleepMs() instead.
- Replaced time_ms() with a threadsafe and non-overflowing cTimeMs (thanks to Rainer
Zocholl for pointing out this problem).

17
lirc.c
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@ -6,7 +6,7 @@
*
* LIRC support added by Carsten Koch <Carsten.Koch@icem.de> 2000-06-16.
*
* $Id: lirc.c 1.8 2004/12/18 13:25:11 kls Exp $
* $Id: lirc.c 1.9 2004/12/19 18:05:13 kls Exp $
*/
#include "lirc.h"
@ -52,8 +52,8 @@ bool cLircRemote::Ready(void)
void cLircRemote::Action(void)
{
int FirstTime = 0;
int LastTime = 0;
cTimeMs FirstTime;
cTimeMs LastTime;
char buf[LIRC_BUFFER_SIZE];
char LastKeyName[LIRC_KEY_BUF] = "";
bool repeat = false;
@ -75,28 +75,27 @@ void cLircRemote::Action(void)
int count;
char KeyName[LIRC_KEY_BUF];
sscanf(buf, "%*x %x %29s", &count, KeyName); // '29' in '%29s' is LIRC_KEY_BUF-1!
int Now = time_ms();
if (count == 0) {
if (strcmp(KeyName, LastKeyName) == 0 && Now - FirstTime < KEYPRESSDELAY)
if (strcmp(KeyName, LastKeyName) == 0 && FirstTime.Elapsed() < KEYPRESSDELAY)
continue; // skip keys coming in too fast
if (repeat)
Put(LastKeyName, false, true);
strcpy(LastKeyName, KeyName);
repeat = false;
FirstTime = Now;
FirstTime.Set();
timeout = -1;
}
else {
if (Now - FirstTime < REPEATDELAY)
if (FirstTime.Elapsed() < REPEATDELAY)
continue; // repeat function kicks in after a short delay
repeat = true;
timeout = REPEATDELAY;
}
LastTime = Now;
LastTime.Set();
Put(KeyName, repeat);
}
else if (repeat) { // the last one was a repeat, so let's generate a release
if (time_ms() - LastTime >= REPEATDELAY) {
if (LastTime.Elapsed() >= REPEATDELAY) {
Put(LastKeyName, false, true);
repeat = false;
*LastKeyName = 0;

28
menu.c
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: menu.c 1.321 2004/12/12 16:07:05 kls Exp $
* $Id: menu.c 1.322 2004/12/19 17:59:47 kls Exp $
*/
#include "menu.h"
@ -2516,7 +2516,7 @@ cDisplayChannel::cDisplayChannel(int Number, bool Switched)
DisplayInfo();
displayChannel->Flush();
}
lastTime = time_ms();
lastTime.Set();
}
cDisplayChannel::cDisplayChannel(eKeys FirstKey)
@ -2525,7 +2525,7 @@ cDisplayChannel::cDisplayChannel(eKeys FirstKey)
group = -1;
number = 0;
lastPresent = lastFollowing = NULL;
lastTime = time_ms();
lastTime.Set();
withInfo = Setup.ShowInfoOnChSwitch;
displayChannel = Skins.Current()->DisplayChannel(withInfo);
ProcessKey(FirstKey);
@ -2570,7 +2570,7 @@ void cDisplayChannel::Refresh(void)
channel = Channels.GetByNumber(cDevice::CurrentChannel());
DisplayChannel();
displayChannel->SetEvents(NULL, NULL);
lastTime = time_ms();
lastTime.Set();
}
eOSState cDisplayChannel::ProcessKey(eKeys Key)
@ -2590,7 +2590,7 @@ eOSState cDisplayChannel::ProcessKey(eKeys Key)
displayChannel->SetEvents(NULL, NULL);
withInfo = false;
DisplayChannel();
lastTime = time_ms();
lastTime.Set();
// Lets see if there can be any useful further input:
int n = channel ? number * 10 : 0;
cChannel *ch = channel;
@ -2639,7 +2639,7 @@ eOSState cDisplayChannel::ProcessKey(eKeys Key)
group = -1;
}
}
lastTime = time_ms();
lastTime.Set();
break;
case kUp|k_Repeat:
case kUp:
@ -2656,14 +2656,14 @@ eOSState cDisplayChannel::ProcessKey(eKeys Key)
Refresh();
break;
case kNone:
if (number && time_ms() - lastTime > DIRECTCHANNELTIMEOUT) {
if (number && lastTime.Elapsed() > DIRECTCHANNELTIMEOUT) {
if (Channels.GetByNumber(number))
Channels.SwitchTo(number);
else {
number = 0;
channel = NULL;
DisplayChannel();
lastTime = time_ms();
lastTime.Set();
return osContinue;
}
return osEnd;
@ -2687,7 +2687,7 @@ eOSState cDisplayChannel::ProcessKey(eKeys Key)
return osEnd;
}
};
if (time_ms() - lastTime < INFOTIMEOUT) {
if (lastTime.Elapsed() < INFOTIMEOUT) {
if (!number && group < 0 && channel && channel->Number() != cDevice::CurrentChannel())
Refresh(); // makes sure a channel switch through the SVDRP CHAN command is displayed
DisplayInfo();
@ -2708,7 +2708,7 @@ cDisplayVolume::cDisplayVolume(void)
:cOsdObject(true)
{
currentDisplayVolume = this;
timeout = time_ms() + (cDevice::PrimaryDevice()->IsMute() ? MUTETIMEOUT : VOLUMETIMEOUT);
timeout.Set(cDevice::PrimaryDevice()->IsMute() ? MUTETIMEOUT : VOLUMETIMEOUT);
displayVolume = Skins.Current()->DisplayVolume();
Show();
}
@ -2745,15 +2745,15 @@ eOSState cDisplayVolume::ProcessKey(eKeys Key)
case kVolDn|k_Repeat:
case kVolDn:
Show();
timeout = time_ms() + VOLUMETIMEOUT;
timeout.Set(VOLUMETIMEOUT);
break;
case kMute:
if (cDevice::PrimaryDevice()->IsMute()) {
Show();
timeout = time_ms() + MUTETIMEOUT;
timeout.Set(MUTETIMEOUT);
}
else
timeout = 0;
timeout.Set();
break;
case kNone: break;
default: if ((Key & k_Release) == 0) {
@ -2761,7 +2761,7 @@ eOSState cDisplayVolume::ProcessKey(eKeys Key)
return osEnd;
}
}
return time_ms() < timeout ? osContinue : osEnd;
return timeout.TimedOut() ? osEnd : osContinue;
}
// --- cRecordControl --------------------------------------------------------

6
menu.h
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: menu.h 1.64 2004/06/13 11:46:03 kls Exp $
* $Id: menu.h 1.65 2004/12/19 17:59:47 kls Exp $
*/
#ifndef __MENU_H
@ -46,7 +46,7 @@ private:
cSkinDisplayChannel *displayChannel;
int group;
bool withInfo;
int lastTime;
cTimeMs lastTime;
int number;
cChannel *channel;
const cEvent *lastPresent;
@ -64,7 +64,7 @@ public:
class cDisplayVolume : public cOsdObject {
private:
cSkinDisplayVolume *displayVolume;
int timeout;
cTimeMs timeout;
static cDisplayVolume *currentDisplayVolume;
virtual void Show(void);
cDisplayVolume(void);

9
rcu.c
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: rcu.c 1.7 2004/12/19 17:19:34 kls Exp $
* $Id: rcu.c 1.8 2004/12/19 18:06:00 kls Exp $
*/
#include "rcu.h"
@ -94,7 +94,7 @@ void cRcuRemote::Action(void)
#pragma pack()
time_t LastCodeRefresh = 0;
int FirstTime = 0;
cTimeMs FirstTime;
uint64 LastCommand = 0;
bool repeat = false;
@ -116,15 +116,14 @@ void cRcuRemote::Action(void)
// This remote control sends the above command before and after
// each keypress - let's just drop this:
break;
int Now = time_ms();
Command |= uint64(Address) << 32;
if (Command != LastCommand) {
LastCommand = Command;
repeat = false;
FirstTime = Now;
FirstTime.Set();
}
else {
if (Now - FirstTime < REPEATDELAY)
if (FirstTime.Elapsed() < REPEATDELAY)
break; // repeat function kicks in after a short delay
repeat = true;
}

44
tools.c
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: tools.c 1.84 2004/12/19 17:19:46 kls Exp $
* $Id: tools.c 1.85 2004/12/19 18:06:16 kls Exp $
*/
#include "tools.h"
@ -187,18 +187,6 @@ int numdigits(int n)
return strlen(buf);
}
int time_ms(void)
{
static time_t t0 = 0;
struct timeval t;
if (gettimeofday(&t, NULL) == 0) {
if (t0 == 0)
t0 = t.tv_sec; // this avoids an overflow (we only work with deltas)
return (t.tv_sec - t0) * 1000 + t.tv_usec / 1000;
}
return 0;
}
bool isnumber(const char *s)
{
if (!*s)
@ -432,6 +420,36 @@ time_t LastModifiedTime(const char *FileName)
return 0;
}
// --- cTimeMs ---------------------------------------------------------------
cTimeMs::cTimeMs(void)
{
Set();
}
void cTimeMs::Set(int Ms)
{
begin = Now() + Ms;
}
bool cTimeMs::TimedOut(void)
{
return Now() >= begin;
}
uint64 cTimeMs::Now(void)
{
struct timeval t;
if (gettimeofday(&t, NULL) == 0)
return (uint64(t.tv_sec)) * 1000 + t.tv_usec / 1000;
return 0;
}
uint64 cTimeMs::Elapsed(void)
{
return Now() - begin;
}
// --- cBufferedStringFunction -----------------------------------------------
cBufferedStringFunction::cBufferedStringFunction(void)

14
tools.h
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: tools.h 1.60 2004/12/19 17:20:05 kls Exp $
* $Id: tools.h 1.61 2004/12/19 18:06:10 kls Exp $
*/
#ifndef __TOOLS_H
@ -71,7 +71,6 @@ bool startswith(const char *s, const char *p);
bool endswith(const char *s, const char *p);
bool isempty(const char *s);
int numdigits(int n);
int time_ms(void);
bool isnumber(const char *s);
int FreeDiskSpaceMB(const char *Directory, int *UsedMB = NULL);
bool DirectoryOk(const char *DirName, bool LogErrors = false);
@ -82,6 +81,17 @@ char *ReadLink(const char *FileName);
bool SpinUpDisk(const char *FileName);
time_t LastModifiedTime(const char *FileName);
class cTimeMs {
private:
uint64 begin;
public:
cTimeMs(void);
void Set(int Ms = 0);
bool TimedOut(void);
uint64 Now(void);
uint64 Elapsed(void);
};
class cBufferedStringFunction {
protected:
char *buffer;