lean2/src/util/interrupt.cpp

84 lines
1.8 KiB
C++

/*
Copyright (c) 2013 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Author: Leonardo de Moura
*/
#include "util/thread.h"
#include "util/interrupt.h"
#include "util/exception.h"
#include "util/memory.h"
namespace lean {
MK_THREAD_LOCAL_GET(atomic_bool, get_g_interrupt, false);
void request_interrupt() {
get_g_interrupt().store(true);
}
void reset_interrupt() {
get_g_interrupt().store(false);
}
bool interrupt_requested() {
return get_g_interrupt().load();
}
void check_interrupted() {
if (interrupt_requested()) {
reset_interrupt();
throw interrupted();
}
}
void check_system(char const * component_name) {
check_stack(component_name);
check_memory(component_name);
check_interrupted();
}
void sleep_for(unsigned ms, unsigned step_ms) {
if (step_ms == 0)
step_ms = 1;
unsigned rounds = ms / step_ms;
chrono::milliseconds c(step_ms);
chrono::milliseconds r(ms % step_ms);
for (unsigned i = 0; i < rounds; i++) {
this_thread::sleep_for(c);
check_interrupted();
}
this_thread::sleep_for(r);
check_interrupted();
}
atomic_bool * interruptible_thread::get_flag_addr() {
return &get_g_interrupt();
}
bool interruptible_thread::interrupted() const {
atomic_bool * f = m_flag_addr.load();
if (f == nullptr)
return false;
return f->load();
}
void interruptible_thread::request_interrupt(unsigned try_ms) {
while (true) {
atomic_bool * f = m_flag_addr.load();
if (f != nullptr) {
f->store(true);
return;
}
this_thread::sleep_for(chrono::milliseconds(try_ms));
check_interrupted();
}
}
void interruptible_thread::join() {
m_thread.join();
}
bool interruptible_thread::joinable() {
return m_thread.joinable();
}
}