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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef jit_CalleeToken_h
#define jit_CalleeToken_h
#include "mozilla/Assertions.h"
#include <stdint.h>
#include "js/TypeDecls.h"
class JS_PUBLIC_API JSTracer;
namespace js::jit {
using CalleeToken = void*;
enum CalleeTokenTag {
CalleeToken_Function = 0x0, // untagged
CalleeToken_FunctionConstructing = 0x1,
CalleeToken_Script = 0x2
};
// Any CalleeToken with this bit set must be CalleeToken_Script.
static const uintptr_t CalleeTokenScriptBit = CalleeToken_Script;
static const uintptr_t CalleeTokenMask = ~uintptr_t(0x3);
static inline CalleeTokenTag GetCalleeTokenTag(CalleeToken token) {
CalleeTokenTag tag = CalleeTokenTag(uintptr_t(token) & 0x3);
MOZ_ASSERT(tag <= CalleeToken_Script);
return tag;
}
static inline CalleeToken CalleeToToken(JSFunction* fun, bool constructing) {
CalleeTokenTag tag =
constructing ? CalleeToken_FunctionConstructing : CalleeToken_Function;
return CalleeToken(uintptr_t(fun) | uintptr_t(tag));
}
static inline CalleeToken CalleeToToken(JSScript* script) {
return CalleeToken(uintptr_t(script) | uintptr_t(CalleeToken_Script));
}
static inline bool CalleeTokenIsFunction(CalleeToken token) {
CalleeTokenTag tag = GetCalleeTokenTag(token);
return tag == CalleeToken_Function || tag == CalleeToken_FunctionConstructing;
}
static inline bool CalleeTokenIsConstructing(CalleeToken token) {
return GetCalleeTokenTag(token) == CalleeToken_FunctionConstructing;
}
static inline JSFunction* CalleeTokenToFunction(CalleeToken token) {
MOZ_ASSERT(CalleeTokenIsFunction(token));
return (JSFunction*)(uintptr_t(token) & CalleeTokenMask);
}
static inline JSScript* CalleeTokenToScript(CalleeToken token) {
MOZ_ASSERT(GetCalleeTokenTag(token) == CalleeToken_Script);
return (JSScript*)(uintptr_t(token) & CalleeTokenMask);
}
CalleeToken TraceCalleeToken(JSTracer* trc, CalleeToken token);
} /* namespace js::jit */
#endif /* jit_CalleeToken_h */
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