longjump.h

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// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
 
#ifndef RUNTIME_VM_LONGJUMP_H_
#define RUNTIME_VM_LONGJUMP_H_
 
#include <setjmp.h>
 
#include "vm/allocation.h"
#include "vm/thread_state.h"
 
namespace dart {
 
class Error;
 
class LongJumpScope : public StackResource {
 public:
  explicit LongJumpScope(ThreadState* thread = ThreadState::Current())
      : StackResource(thread), top_(nullptr), base_(thread->long_jump_base()) {
    thread->set_long_jump_base(this);
  }
 
  ~LongJumpScope() {
    ASSERT(thread() == ThreadState::Current());
    thread()->set_long_jump_base(base_);
  }
 
  jmp_buf* Set();
  DART_NORETURN void Jump(int value, const Error& error);
  DART_NORETURN void Jump(int value);
 
 private:
  jmp_buf environment_;
  StackResource* top_;
  LongJumpScope* base_;
 
  DISALLOW_COPY_AND_ASSIGN(LongJumpScope);
};
 
}  // namespace dart
 
#endif  // RUNTIME_VM_LONGJUMP_H_