51 lines
1.6 KiB
Plaintext
51 lines
1.6 KiB
Plaintext
//===-- MemoryMonitorMacOSX.mm --------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Host/MemoryMonitor.h"
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#include <cassert>
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#include <dispatch/dispatch.h>
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using namespace lldb_private;
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class MemoryMonitorMacOSX : public MemoryMonitor {
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using MemoryMonitor::MemoryMonitor;
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void Start() override {
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m_memory_pressure_source = dispatch_source_create(
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DISPATCH_SOURCE_TYPE_MEMORYPRESSURE, 0,
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DISPATCH_MEMORYPRESSURE_WARN | DISPATCH_MEMORYPRESSURE_CRITICAL,
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dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0));
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if (!m_memory_pressure_source)
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return;
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dispatch_source_set_event_handler(m_memory_pressure_source, ^{
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dispatch_source_memorypressure_flags_t pressureLevel =
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dispatch_source_get_data(m_memory_pressure_source);
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if (pressureLevel &
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(DISPATCH_MEMORYPRESSURE_WARN | DISPATCH_MEMORYPRESSURE_CRITICAL)) {
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m_callback();
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}
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});
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dispatch_activate(m_memory_pressure_source);
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}
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void Stop() override {
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if (m_memory_pressure_source) {
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dispatch_source_cancel(m_memory_pressure_source);
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dispatch_release(m_memory_pressure_source);
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}
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}
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private:
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dispatch_source_t m_memory_pressure_source;
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};
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std::unique_ptr<MemoryMonitor> MemoryMonitor::Create(Callback callback) {
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return std::make_unique<MemoryMonitorMacOSX>(callback);
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}
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