mirror of
https://github.com/gnustep/libs-base.git
synced 2025-04-25 17:51:01 +00:00
daecca9270
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@31252 72102866-910b-0410-8b05-ffd578937521
71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/**
|
|
* capabilities.h - This file defines the list of capabilities. Runtime
|
|
* capabilities can be checked. You may use #ifdef to test at compile time
|
|
* whether the runtime on the current platform understands the capability.
|
|
* This does not mean that the runtime implements the capability, however.
|
|
*
|
|
* A copy of this file exists for compatibility in GNUstep's Objective-C
|
|
* framework. When using this framework in conjunction with the GNU
|
|
* Objective-C runtime, most of the features will not be supported at run time,
|
|
* even if the corresponding macros are available at compile time.
|
|
* Additionally, several are compile-time options in the GNUstep runtime, so
|
|
* although they are present in the header and understood by the runtime, they
|
|
* may not be supported by the installed runtime.
|
|
*/
|
|
|
|
/**
|
|
* The runtime supports zero-cost exceptions.
|
|
*/
|
|
#define OBJC_CAP_EXCEPTIONS 0
|
|
/**
|
|
* The runtime supports the @synchronize directive.
|
|
*/
|
|
#define OBJC_CAP_SYNCRONIZE 1
|
|
/**
|
|
* The runtime supports property accessors.
|
|
*/
|
|
#define OBJC_CAP_PROPERTIES 2
|
|
/**
|
|
* The runtime supports introspection on declared properties.
|
|
*/
|
|
#define OBJC_CAP_PROPERTY_INTROSPECTION 3
|
|
/**
|
|
* The runtime supports optional methods and declared properties in protocols.
|
|
*/
|
|
#define OBJC_CAP_OPTIONAL_PROTOCOLS 4
|
|
/**
|
|
* The runtime supports non-fragile instance variables.
|
|
*/
|
|
#define OBJC_CAP_NONFRAGILE_IVARS 5
|
|
/**
|
|
* The runtime supports making method lookup dependent on the types, as well as
|
|
* the name, of the selector.
|
|
*/
|
|
#define OBJC_CAP_TYPE_DEPENDENT_DISPATCH 6
|
|
/**
|
|
* The runtime was compiled in the low-memory profile. This trades some speed
|
|
* for reduced memory consumption.
|
|
*/
|
|
#define OBJC_CAP_LOW_MEMORY 7
|
|
|
|
|
|
/**
|
|
* Macro used to require the existence of a specific capability. This creates
|
|
* a function that is called by the loader and tests that the runtime supports
|
|
* the required capability, aborting if it does not.
|
|
*/
|
|
#define OBJC_REQUIRE_CAPABILITY(x) \
|
|
__attribute__((constructor)) static void objc_test ## x(void)\
|
|
{\
|
|
if (!objc_test_capability(x))\
|
|
{\
|
|
fprintf(stderr, "Runtime does not support required property: " #x "\n");\
|
|
exit(1);\
|
|
}\
|
|
}
|
|
|
|
/**
|
|
* Run time feature test. This function returns 1 if the runtime supports the
|
|
* specified feature or 0 if it does not.
|
|
*/
|
|
int objc_test_capability(int x);
|