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- /*
- * Copyright 2018 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef SkMacros_DEFINED
- #define SkMacros_DEFINED
- /*
- * Usage: SK_MACRO_CONCAT(a, b) to construct the symbol ab
- *
- * SK_MACRO_CONCAT_IMPL_PRIV just exists to make this work. Do not use directly
- *
- */
- #define SK_MACRO_CONCAT(X, Y) SK_MACRO_CONCAT_IMPL_PRIV(X, Y)
- #define SK_MACRO_CONCAT_IMPL_PRIV(X, Y) X ## Y
- /*
- * Usage: SK_MACRO_APPEND_LINE(foo) to make foo123, where 123 is the current
- * line number. Easy way to construct
- * unique names for local functions or
- * variables.
- */
- #define SK_MACRO_APPEND_LINE(name) SK_MACRO_CONCAT(name, __LINE__)
- /**
- * For some classes, it's almost always an error to instantiate one without a name, e.g.
- * {
- * SkAutoMutexAcquire(&mutex);
- * <some code>
- * }
- * In this case, the writer meant to hold mutex while the rest of the code in the block runs,
- * but instead the mutex is acquired and then immediately released. The correct usage is
- * {
- * SkAutoMutexAcquire lock(&mutex);
- * <some code>
- * }
- *
- * To prevent callers from instantiating your class without a name, use SK_REQUIRE_LOCAL_VAR
- * like this:
- * class classname {
- * <your class>
- * };
- * #define classname(...) SK_REQUIRE_LOCAL_VAR(classname)
- *
- * This won't work with templates, and you must inline the class' constructors and destructors.
- * Take a look at SkAutoFree and SkAutoMalloc in this file for examples.
- */
- #define SK_REQUIRE_LOCAL_VAR(classname) \
- static_assert(false, "missing name for " #classname)
- ////////////////////////////////////////////////////////////////////////////////
- // Can be used to bracket data types that must be dense, e.g. hash keys.
- #if defined(__clang__) // This should work on GCC too, but GCC diagnostic pop didn't seem to work!
- #define SK_BEGIN_REQUIRE_DENSE _Pragma("GCC diagnostic push") \
- _Pragma("GCC diagnostic error \"-Wpadded\"")
- #define SK_END_REQUIRE_DENSE _Pragma("GCC diagnostic pop")
- #else
- #define SK_BEGIN_REQUIRE_DENSE
- #define SK_END_REQUIRE_DENSE
- #endif
- #define SK_INIT_TO_AVOID_WARNING = 0
- #endif // SkMacros_DEFINED
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