From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libgo/runtime/go-defer.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 libgo/runtime/go-defer.c (limited to 'libgo/runtime/go-defer.c') diff --git a/libgo/runtime/go-defer.c b/libgo/runtime/go-defer.c new file mode 100644 index 000000000..6425f0586 --- /dev/null +++ b/libgo/runtime/go-defer.c @@ -0,0 +1,69 @@ +/* go-defer.c -- manage the defer stack. + + Copyright 2009 The Go Authors. All rights reserved. + Use of this source code is governed by a BSD-style + license that can be found in the LICENSE file. */ + +#include + +#include "go-alloc.h" +#include "go-panic.h" +#include "go-defer.h" + +/* This function is called each time we need to defer a call. */ + +void +__go_defer (void *frame, void (*pfn) (void *), void *arg) +{ + struct __go_defer_stack *n; + + if (__go_panic_defer == NULL) + __go_panic_defer = ((struct __go_panic_defer_struct *) + __go_alloc (sizeof (struct __go_panic_defer_struct))); + + n = (struct __go_defer_stack *) __go_alloc (sizeof (struct __go_defer_stack)); + n->__next = __go_panic_defer->__defer; + n->__frame = frame; + n->__panic = __go_panic_defer->__panic; + n->__pfn = pfn; + n->__arg = arg; + n->__retaddr = NULL; + __go_panic_defer->__defer = n; +} + +/* This function is called when we want to undefer the stack. */ + +void +__go_undefer (void *frame) +{ + if (__go_panic_defer == NULL) + return; + while (__go_panic_defer->__defer != NULL + && __go_panic_defer->__defer->__frame == frame) + { + struct __go_defer_stack *d; + void (*pfn) (void *); + + d = __go_panic_defer->__defer; + pfn = d->__pfn; + d->__pfn = NULL; + + if (pfn != NULL) + (*pfn) (d->__arg); + + __go_panic_defer->__defer = d->__next; + __go_free (d); + } +} + +/* This function is called to record the address to which the deferred + function returns. This may in turn be checked by __go_can_recover. + The frontend relies on this function returning false. */ + +_Bool +__go_set_defer_retaddr (void *retaddr) +{ + if (__go_panic_defer != NULL && __go_panic_defer->__defer != NULL) + __go_panic_defer->__defer->__retaddr = retaddr; + return 0; +} -- cgit v1.2.3