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Side by Side Diff: runtime/vm/longjump.h

Issue 108383007: Replaces LongJump with LongJumpScope. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 6 years, 11 months ago
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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #ifndef VM_LONGJUMP_H_ 5 #ifndef VM_LONGJUMP_H_
6 #define VM_LONGJUMP_H_ 6 #define VM_LONGJUMP_H_
7 7
8 #include <setjmp.h> 8 #include <setjmp.h>
9 9
10 #include "vm/allocation.h" 10 #include "vm/allocation.h"
11 #include "vm/isolate.h"
11 12
12 namespace dart { 13 namespace dart {
13 14
14 class Error; 15 class Error;
15 16
16 class LongJump : public ValueObject { 17 class LongJumpScope : public ValueObject {
17 public: 18 public:
18 LongJump() : top_(NULL) { } 19 LongJumpScope() : top_(NULL), base_(Isolate::Current()->long_jump_base()) {
20 Isolate::Current()->set_long_jump_base(this);
21 }
22
23 ~LongJumpScope() {
24 Isolate::Current()->set_long_jump_base(base_);
25 }
19 26
20 jmp_buf* Set(); 27 jmp_buf* Set();
21 void Jump(int value, const Error& error); 28 void Jump(int value, const Error& error);
22 29
23 // Would it be safe to use this longjump? 30 // Would it be safe to use this longjump?
24 // 31 //
25 // Checks to make sure that the jump would not cross Dart frames. 32 // Checks to make sure that the jump would not cross Dart frames.
26 bool IsSafeToJump(); 33 bool IsSafeToJump();
27 34
28 private: 35 private:
29 jmp_buf environment_; 36 jmp_buf environment_;
30 StackResource* top_; 37 StackResource* top_;
38 LongJumpScope* base_;
31 39
32 DISALLOW_COPY_AND_ASSIGN(LongJump); 40 DISALLOW_COPY_AND_ASSIGN(LongJumpScope);
33 }; 41 };
34 42
35 } // namespace dart 43 } // namespace dart
36 44
37 #endif // VM_LONGJUMP_H_ 45 #endif // VM_LONGJUMP_H_
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