82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
/*
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Copyright (c) 2013 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#include <limits>
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#include "runtime/thread.h"
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#include "runtime/interrupt.h"
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#include "runtime/exception.h"
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#include "runtime/memory.h"
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#include "lean/lean.h"
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#include "util/io.h"
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namespace lean {
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LEAN_THREAD_VALUE(size_t, g_max_heartbeat, 0);
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LEAN_THREAD_VALUE(size_t, g_heartbeat, 0);
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void inc_heartbeat() { g_heartbeat++; }
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void reset_heartbeat() { g_heartbeat = 0; }
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void set_max_heartbeat(size_t max) { g_max_heartbeat = max; }
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size_t get_max_heartbeat() { return g_max_heartbeat; }
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void set_max_heartbeat_thousands(unsigned max) { g_max_heartbeat = static_cast<size_t>(max) * 1000; }
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scope_heartbeat::scope_heartbeat(size_t max):flet<size_t>(g_heartbeat, max) {}
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LEAN_EXPORT scope_max_heartbeat::scope_max_heartbeat(size_t max):flet<size_t>(g_max_heartbeat, max) {}
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// separate definition to allow breakpoint in debugger
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void throw_heartbeat_exception() {
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throw heartbeat_exception();
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}
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void check_heartbeat() {
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inc_heartbeat();
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if (g_max_heartbeat > 0 && g_heartbeat > g_max_heartbeat)
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throw_heartbeat_exception();
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}
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LEAN_THREAD_VALUE(lean_object *, g_cancel_tk, nullptr);
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LEAN_EXPORT scope_cancel_tk::scope_cancel_tk(lean_object * o):flet<lean_object *>(g_cancel_tk, o) {}
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/* CancelToken.isSet : @& IO.CancelToken → BaseIO Bool */
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extern "C" lean_obj_res lean_io_cancel_token_is_set(b_lean_obj_arg cancel_tk, lean_obj_arg);
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void check_interrupted() {
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if (g_cancel_tk) {
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inc_ref(g_cancel_tk);
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if (get_io_scalar_result<bool>(lean_io_cancel_token_is_set(g_cancel_tk, lean_io_mk_world())) &&
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!std::uncaught_exception()) {
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throw interrupted();
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}
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}
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}
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void check_system(char const * component_name, bool do_check_interrupted) {
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check_stack(component_name);
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check_memory(component_name);
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if (do_check_interrupted) {
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check_interrupted();
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check_heartbeat();
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}
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}
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void sleep_for(unsigned ms, unsigned step_ms) {
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if (step_ms == 0)
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step_ms = 1;
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unsigned rounds = ms / step_ms;
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chrono::milliseconds c(step_ms);
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chrono::milliseconds r(ms % step_ms);
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for (unsigned i = 0; i < rounds; i++) {
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this_thread::sleep_for(c);
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check_interrupted();
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}
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this_thread::sleep_for(r);
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check_interrupted();
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}
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}
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