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Add mechanism to expose kernel variables to userspace via ProcFS.

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Only booleans are supported at first. More types can be added easily.
Use this to add /proc/sys/wm_flash_flush which when enabled flashes pending
screen flush rects in yellow before they happen.
This commit is contained in:
Andreas Kling 2019-01-18 15:01:40 +01:00
parent 9454c5dd52
commit f7cc454162
8 changed files with 121 additions and 29 deletions
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5
Kernel/ProcFileSystem.h
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@ -18,9 +18,14 @@ public:
void add_process(Process&);
void remove_process(Process&);
void add_sys_file(String&&, Function<ByteBuffer(SynthFSInode&)>&& read_callback, Function<ssize_t(SynthFSInode&, const ByteBuffer&)>&& write_callback);
void add_sys_bool(String&&, bool*, Function<void()>&& change_callback = nullptr);
private:
ProcFS();
HashMap<pid_t, InodeIndex> m_pid2inode;
InodeIdentifier m_sys_dir;
};