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#include "runtimeContext.h"
#include <cerrno>
#include <cstring>
#include <sys.h>
namespace AdHoc::System {
RuntimeContext::RuntimeContext(size_t stacksize) :
stack(stacksize)
{
if (getcontext(&ctxCallback) == -1) {
throw SystemException("getcontext(3) failed", strerror(errno), errno);
}
ctxCallback.uc_stack.ss_sp = &stack.front();
ctxCallback.uc_stack.ss_size = stacksize;
ctxCallback.uc_link = &ctxInitial;
makecontext(&ctxCallback, (void (*)())&RuntimeContext::callbackWrapper, 1, this);
}
void
RuntimeContext::swapContext()
{
swapped = !swapped;
if (swapped) {
swapcontext(&ctxInitial, &ctxCallback);
}
else {
if (!completed) {
swapcontext(&ctxCallback, &ctxInitial);
}
}
}
bool
RuntimeContext::hasCompleted() const
{
return completed;
}
void
RuntimeContext::callbackWrapper(RuntimeContext * rc)
{
rc->callback();
rc->completed = true;
}
}
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