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76 lines
2.5 KiB
76 lines
2.5 KiB
15 years ago
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// Copyright 2010 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_VM_STATE_H_
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#define V8_VM_STATE_H_
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namespace v8 {
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namespace internal {
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class VMState BASE_EMBEDDED {
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#ifdef ENABLE_VMSTATE_TRACKING
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public:
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inline VMState(StateTag state);
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inline ~VMState();
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StateTag state() { return state_; }
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void set_external_callback(Address external_callback) {
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external_callback_ = external_callback;
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}
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// Used for debug asserts.
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static bool is_outermost_external() {
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return current_state_ == NULL;
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}
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static StateTag current_state() {
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return current_state_ ? current_state_->state() : EXTERNAL;
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}
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static Address external_callback() {
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return current_state_ ? current_state_->external_callback_ : NULL;
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}
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private:
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bool disabled_;
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StateTag state_;
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VMState* previous_;
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Address external_callback_;
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// A stack of VM states.
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static VMState* current_state_;
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#else
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public:
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explicit VMState(StateTag state) {}
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#endif
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};
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} } // namespace v8::internal
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#endif // V8_VM_STATE_H_
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