/* FIXME: do not rely on NSIG being a multiple of 8 */
#define REAL_SIGSET_SIZE_BYTES ((NSIG/8))
+/* Set all deferrable signals into *s. */
+extern void sigaddset_deferrable(sigset_t *s);
+/* Set all blockable signals into *s. */
+extern void sigaddset_blockable(sigset_t *s);
+/* Set all gc signals into *s. */
+extern void sigaddset_gc(sigset_t *s);
+
extern sigset_t deferrable_sigset;
extern sigset_t blockable_sigset;
+extern sigset_t gc_sigset;
+extern void block_deferrable_signals(void);
+extern void block_blockable_signals(void);
+extern void unblock_deferrable_signals(void);
+extern void unblock_gc_signals(void);
+extern void unblock_signals_in_context_and_maybe_warn(os_context_t *context);
+
+extern boolean deferrables_blocked_in_sigset_p(sigset_t *sigset);
+extern void check_deferrables_blocked_or_lose(void);
extern void check_blockables_blocked_or_lose(void);
extern void check_gc_signals_unblocked_or_lose(void);
-extern void unblock_gc_signals(void);
+extern void check_gc_signals_unblocked_in_sigset_or_lose(sigset_t *sigset);
+
+extern void maybe_save_gc_mask_and_block_deferrables(sigset_t *sigset);
static inline void
sigcopyset(sigset_t *new, sigset_t *old)
int pending_signal;
siginfo_t pending_info;
sigset_t pending_mask;
+ /* Was pending mask saved for gc request? True if GC_PENDING or
+ * SIG_STOP_FOR_GC happened in a pseudo atomic with no GC_INHIBIT
+ * NIL. Both deferrable interrupt handlers and gc are careful not
+ * to clobber each other's pending_mask. */
+ boolean gc_blocked_deferrables;
};
-
+extern boolean interrupt_handler_pending_p(void);
extern void interrupt_init(void);
extern void fake_foreign_function_call(os_context_t* context);
extern void undo_fake_foreign_function_call(os_context_t* context);
extern union interrupt_handler interrupt_handlers[NSIG];
-/* Set all deferrable signals into *s. */
-extern void sigaddset_deferrable(sigset_t *s);
-/* Set all blockable signals into *s. */
-extern void sigaddset_blockable(sigset_t *s);
-
-extern void block_blockable_signals(void);
-
/* The void* casting here avoids having to mess with the various types
* of function argument lists possible for signal handlers:
* SA_SIGACTION handlers have one signature, and the default old-style