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Copy pathnode_internals.h
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115 lines (94 loc) · 3.53 KB
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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef SRC_NODE_INTERNALS_H_
#define SRC_NODE_INTERNALS_H_
namespace node {
// Triggers a compile-time error if the assertion fails.
// The assertion needs to be a constant expression.
#define BUILD_BUG_ON(cond) ((void) sizeof(char[1 - 2 * !!(cond)]))
// Disallow the copy constructor and assignment. Use it in the
// private: sections of your class.
#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
TypeName(const TypeName&); \
void operator=(const TypeName&)
// Like DISALLOW_COPY_AND_ASSIGN but also disables the default
// constructor.
#define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
TypeName(); \
DISALLOW_COPY_AND_ASSIGN(TypeName)
#ifndef offset_of
// g++ in strict mode complains loudly about the system offsetof() macro
// because it uses NULL as the base address.
#define offset_of(type, member) \
((intptr_t) ((char *) &(((type *) 8)->member) - 8))
#endif
#ifndef container_of
#define container_of(ptr, type, member) \
((type *) ((char *) (ptr) - offset_of(type, member)))
#endif
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(a) (sizeof((a)) / sizeof((a)[0]))
#endif
//
// isolates support
//
#if HAVE_ISOLATES
# if _WIN32
# define THREAD __declspec(thread)
# else
# define THREAD __thread
# endif
# define TLS(type, name) THREAD type* __tls_##name
# define VAR(name) (*__tls_##name)
# define EMPTY(name) (__tls_##name == NULL)
# define ASSIGN(name, val) ((__tls_##name) = P(val))
# define LAZY_ASSIGN(name, val) \
do if (!__tls_##name) ((__tls_##name) = P(val)); while (0)
template <class T> inline v8::Persistent<T>* P(v8::Handle<T> v)
{
return new v8::Persistent<T>(v8::Persistent<T>::New(v));
}
inline v8::Persistent<v8::String>* P(const char* symbol)
{
return new v8::Persistent<v8::String>(
v8::Persistent<v8::String>::New(
v8::String::NewSymbol(symbol)));
}
#else // !HAVE_ISOLATES
# define THREAD /* nothing */
# define TLS(type, name) type name
# define VAR(name) (name)
# define EMPTY(name) ((name).IsEmpty())
# define ASSIGN(name, val) ((name) = P(val))
# define LAZY_ASSIGN(name, val) \
do if ((name).IsEmpty()) (name) = P(val); while (0)
template <class T> inline v8::Persistent<T> P(v8::Handle<T> v)
{
return v8::Persistent<T>(v);
}
inline v8::Persistent<v8::String> P(const char* symbol)
{
return v8::Persistent<v8::String>::New(
v8::String::NewSymbol(symbol));
}
#endif // HAVE_ISOLATES
} // namespace node
#endif // SRC_NODE_INTERNALS_H_