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| -rw-r--r-- | src/alloc.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/alloc.c b/src/alloc.c index 9b5f2955aa5..5de7d384a49 100644 --- a/src/alloc.c +++ b/src/alloc.c @@ -4704,6 +4704,17 @@ mark_stack (char *bottom, char *end) #endif } +/* This is a trampoline function that flushes registers to the stack, + and then calls FUNC. ARG is passed through to FUNC verbatim. + + This function must be called whenever Emacs is about to release the + global interpreter lock. This lets the garbage collector easily + find roots in registers on threads that are not actively running + Lisp. + + It is invalid to run any Lisp code or to allocate any GC memory + from FUNC. */ + void flush_stack_call_func (void (*func) (void *arg), void *arg) { |