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// pthaiku.cpp - portable timer implementation for Haiku
#include "porttime.h"
#include <Looper.h>
#include <MessageRunner.h>
#include <OS.h>
namespace {
const uint32 timerMessage = 'PTTM';
struct TimerLooper : BLooper {
TimerLooper() : BLooper() {
}
virtual void MessageReceived(BMessage *message)
{
PtCallback *callback;
void *userData;
if (message->what == timerMessage && message->FindPointer("callback", (void**)&callback) == B_OK && message->FindPointer("userData", &userData) == B_OK) {
(*callback)(Pt_Time(), userData);
}
BLooper::MessageReceived(message);
}
};
bool time_started_flag = false;
bigtime_t time_offset;
TimerLooper *timerLooper;
BMessageRunner *timerRunner;
}
extern "C" {
PtError Pt_Start(int resolution, PtCallback *callback, void *userData)
{
if (time_started_flag) return ptAlreadyStarted;
time_offset = system_time();
if (callback) {
timerLooper = new TimerLooper;
timerLooper->Run();
BMessenger target(timerLooper);
BMessage message(timerMessage);
message.AddPointer("callback", (void*)callback);
message.AddPointer("userData", userData);
bigtime_t interval = resolution * 1000;
timerRunner = new BMessageRunner(target, &message, interval);
if(timerRunner->InitCheck() != B_OK) {
delete timerRunner;
timerRunner = NULL;
timerLooper->PostMessage(B_QUIT_REQUESTED);
timerLooper = NULL;
return ptHostError;
}
}
time_started_flag = true;
return ptNoError;
}
PtError Pt_Stop()
{
if (!time_started_flag) return ptAlreadyStopped;
time_started_flag = false;
delete timerRunner;
timerRunner = NULL;
timerLooper->PostMessage(B_QUIT_REQUESTED);
timerLooper = NULL;
return ptNoError;
}
int Pt_Started()
{
return time_started_flag;
}
PtTimestamp Pt_Time()
{
return (system_time() - time_offset) / 1000;
}
void Pt_Sleep(int32_t duration)
{
snooze(duration * 1000);
}
}
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