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authorIan Lance Taylor <ian@gcc.gnu.org>2010-12-03 04:34:57 +0000
committerIan Lance Taylor <ian@gcc.gnu.org>2010-12-03 04:34:57 +0000
commit7a9389330e91acc3ed05deac2d198af25d13cf3c (patch)
tree38fe54a4f38ede5d949c915d66191f24a6fe5153 /libgo/runtime/go-defer.c
parent1aa6700378e5188a853c018256113ce6e1fb5c05 (diff)
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Add Go frontend, libgo library, and Go testsuite.
gcc/: * gcc.c (default_compilers): Add entry for ".go". * common.opt: Add -static-libgo as a driver option. * doc/install.texi (Configuration): Mention libgo as an option for --enable-shared. Mention go as an option for --enable-languages. * doc/invoke.texi (Overall Options): Mention .go as a file name suffix. Mention go as a -x option. * doc/frontends.texi (G++ and GCC): Mention Go as a supported language. * doc/sourcebuild.texi (Top Level): Mention libgo. * doc/standards.texi (Standards): Add section on Go language. Move references for other languages into their own section. * doc/contrib.texi (Contributors): Mention that I contributed the Go frontend. gcc/testsuite/: * lib/go.exp: New file. * lib/go-dg.exp: New file. * lib/go-torture.exp: New file. * lib/target-supports.exp (check_compile): Match // Go. From-SVN: r167407
Diffstat (limited to 'libgo/runtime/go-defer.c')
-rw-r--r--libgo/runtime/go-defer.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/libgo/runtime/go-defer.c b/libgo/runtime/go-defer.c
new file mode 100644
index 0000000..6425f05
--- /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 <stddef.h>
+
+#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;
+}