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Implement basic support for POSIX-style select().

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Now we can block on both the PTY *and* the GUI event stream in Terminal.
This commit is contained in:
Andreas Kling 2019-01-15 23:12:20 +01:00
parent 46181cf023
commit 10387beda7
8 changed files with 164 additions and 30 deletions
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7
Kernel/Process.h
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@ -69,6 +69,7 @@ public:
BlockedRead,
BlockedWrite,
BlockedSignal,
BlockedSelect,
};
enum RingLevel {
@ -81,7 +82,7 @@ public:
bool is_blocked() const
{
return m_state == BlockedSleep || m_state == BlockedWait || m_state == BlockedRead || m_state == BlockedSignal;
return m_state == BlockedSleep || m_state == BlockedWait || m_state == BlockedRead || m_state == BlockedSignal || m_state == BlockedSelect;
}
PageDirectory& page_directory() { return *m_page_directory; }
@ -156,6 +157,7 @@ public:
void* sys$mmap(const Syscall::SC_mmap_params*);
int sys$munmap(void*, size_t size);
int sys$set_mmap_name(void*, size_t, const char*);
int sys$select(const Syscall::SC_select_params*);
ssize_t sys$get_dir_entries(int fd, void*, size_t);
int sys$getcwd(char*, size_t);
int sys$chdir(const char*);
@ -304,6 +306,8 @@ private:
dword m_timesScheduled { 0 };
pid_t m_waitee_pid { -1 };
int m_blocked_fd { -1 };
Vector<int> m_select_read_fds;
Vector<int> m_select_write_fds;
size_t m_max_open_file_descriptors { 16 };
SignalActionData m_signal_action_data[32];
dword m_pending_signals { 0 };
@ -394,6 +398,7 @@ static inline const char* toString(Process::State state)
case Process::BlockedRead: return "Read";
case Process::BlockedWrite: return "Write";
case Process::BlockedSignal: return "Signal";
case Process::BlockedSelect: return "Select";
case Process::BeingInspected: return "Inspect";
}
ASSERT_NOT_REACHED();