| // Copyright 2017 The Fuchsia Authors |
| // |
| // Use of this source code is governed by a MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT |
| |
| #pragma once |
| |
| #include <sys/types.h> |
| |
| // Called when the system is low on memory, |shortfall_bytes| below the memory |
| // redline. |
| typedef void(oom_lowmem_callback_t)(size_t shortfall_bytes); |
| |
| // Initializes the out-of-memory system. If |enable| is true, starts the |
| // memory-watcher thread, which calls |lowmem_callback| when the PMM has less |
| // than |redline_bytes| free memory, sleeping for |sleep_duration_ns| between |
| // checks. |
| // |
| // If |enable| is false, the thread can be started manually using 'k oom start'. |
| // TODO(dbort): Add a programmatic way to start/stop the thread. |
| void oom_init(bool enable, uint64_t sleep_duration_ns, size_t redline_bytes, |
| oom_lowmem_callback_t* lowmem_callback); |
