diff options
Diffstat (limited to 'gdb/extension.h')
| -rw-r--r-- | gdb/extension.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/gdb/extension.h b/gdb/extension.h index 9ba1299..94a500d 100644 --- a/gdb/extension.h +++ b/gdb/extension.h @@ -429,4 +429,34 @@ private: bool m_prev_cooperative_sigint_handling_disabled; }; +/* GDB's SIGINT handler basically sets a flag; code that might take a + long time before it gets back to the event loop, and which ought to + be interruptible, checks this flag using the QUIT macro, which, if + GDB has the terminal, throws a quit exception. + + In addition to setting a flag, the SIGINT handler also marks a + select/poll-able file descriptor as read-ready. That is used by + interruptible_select in order to support interrupting blocking I/O + in a race-free manner. + + These functions use the extension_language_ops API to allow extension + language(s) and GDB SIGINT handling to coexist seamlessly. */ + +/* Return true if the quit flag has been set, false otherwise. + Note: The flag is cleared as a side-effect. + The flag is checked in all extension languages that support cooperative + SIGINT handling, not just the current one. This simplifies transitions. */ + +extern int check_quit_flag (); + +/* Set the quit flag. + This only sets the flag in the currently active extension language. + If the currently active extension language does not have cooperative + SIGINT handling, then GDB's global flag is set, and it is up to the + extension language to call check_quit_flag. The extension language + is free to install its own SIGINT handler, but we still need to handle + the transition. */ + +extern void set_quit_flag (); + #endif /* EXTENSION_H */ |