Moved OS dependent code.

1 files changed, 51 insertions, 1 deletions

diff --git a/TUI/unix.jai b/TUI/unix.jai
index a35a60a..7ff1e72 100644
--- a/TUI/unix.jai
+++ b/TUI/unix.jai
@@ -137,7 +137,6 @@
 #scope_export
 
 OS_prepare_terminal :: () {
-    error: s32;
     tcgetattr(STDIN_FILENO, *initial_tio_mode); // TODO Log on error.
     raw_tio_mode = initial_tio_mode;
     raw_tio_mode.c_iflag &= ~(.IGNBRK | .BRKINT | .PARMRK | .ISTRIP | .INLCR | .IGNCR | .ICRNL | .IXON);
@@ -148,10 +147,16 @@ OS_prepare_terminal :: () {
     raw_tio_mode.c_cc[Control_Chars.VMIN] = 1;
     raw_tio_mode.c_cc[Control_Chars.VTIME] = 0;
     tcsetattr(STDIN_FILENO, 0, *raw_tio_mode); // TODO Log on error.
+
+    was_resized = false;
+    init(*resize_mutex, "resize_mutex");
+    prepare_resize_handler();
 }
 
 OS_reset_terminal :: () {
     tcsetattr(STDIN_FILENO, 0, *initial_tio_mode); // TODO Log on error.
+
+    restore_resize_handler();
 }
 
 OS_read_input :: (buffer: *u8, bytes_to_read: s64) -> bytes_read: s64, error: bool = false, error_message: string = "" {
@@ -162,3 +167,48 @@ OS_read_input :: (buffer: *u8, bytes_to_read: s64) -> bytes_read: s64, error: bo
     }
     return bytes_read;
 }
+
+OS_wait_for_input :: (timeout_milliseconds: s32) -> is_input_available: bool {
+    fds     := pollfd.[ .{ fd = STDIN_FILENO, events = POLLIN, revents = 0 } ];
+    nfds    := fds.count;
+    poll_return := poll(fds.data, xx nfds, xx timeout_milliseconds); // TODO Wait for input using poll syscall. This breaks and throws '-1 | 4 | Interrupted system call' when we resize the window while polling.
+    error_code, error_message := get_error_value_and_string(); // FIXME Not used.
+    return ifx poll_return > 0 then true else false;
+}
+
+resize_mutex    : Mutex;
+was_resized     : bool;
+
+OS_was_terminal_resized :: () -> bool {
+    lock(*resize_mutex);
+    defer unlock(*resize_mutex);
+    defer was_resized = false;
+    return was_resized;
+}
+
+resize_handler :: (signal_code : s32) #c_call {
+    new_context : Context;
+	push_context new_context {
+	    print("SIGNAL:%", signal_code);
+	    if signal_code != SIGWINCH  then return;
+	    if was_resized == true      then return;
+	    print("RESIZE\n");
+	    lock(*resize_mutex);
+	    defer unlock(*resize_mutex);
+        was_resized = true;
+    }
+}
+
+prepare_resize_handler :: () {
+	sa : sigaction_t;
+	sa.sa_handler = resize_handler;
+	sigemptyset(*(sa.sa_mask));
+	sa.sa_flags = SA_RESTART;
+	sigaction(SIGWINCH, *sa, null);
+}
+
+restore_resize_handler :: () {
+	sa : sigaction_t;
+	sa.sa_handler = SIG_DFL;
+	sigaction(SIGWINCH, null, *sa);
+}