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#pragma once
#include <Task.h>
namespace Balau {
class StacklessTask : public Task {
public:
StacklessTask() : m_state(0) { setStackless(); }
protected:
void taskSwitch() throw (GeneralException) { throw TaskSwitch(); }
unsigned int m_state;
};
};
#define StacklessBegin() \
switch(m_state) { \
case 0: { \
#define StacklessOperation(operation) \
m_state = __LINE__; \
} \
case __LINE__: { \
try { \
operation; \
} \
catch (Balau::EAgain & e) { \
taskSwitch(); \
} \
#define StacklessWaitFor(evt) \
m_state = __LINE__; \
waitFor(evt); \
taskSwitch(); \
} \
case __LINE__: { \
#define StacklessWait(cond) \
m_state = __LINE__; \
} \
case __LINE__: { \
if (!(cond)) \
taskSwitch(); \
#define StacklessYield() \
m_state = __LINE__; \
try { \
yield(true); \
} \
catch (Balau::EAgain & e) { \
taskSwitch(); \
} \
} \
case __LINE__: { \
#define StacklessEnd() \
break; \
} \
default: \
AssertHelper("unknown state", "State %i is out of range in task %s at %p", m_state, getName(), this); \
}
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