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Support API versioning in platform-specific headers (see #3836)

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- Exclude platform-specific includes (anything in < >) from the
  clang preprocessor by using `!defined(GENERATING_CEF_API_HASH)`
  in CEF header files.
- Define "target platforms" by passing platform- and architecture-
  specific ifdefs to the clang preprocessor. Grep for `defined(OS_`
  to identify headers that require target platform processing, and
  then process for each target as the platform-specific API hash
  contribution.
- Delete the univeral hash which is no longer a useful concept.
This commit is contained in:
Nik Pavlov
2025-02-25 11:43:44 -05:00
committed by Marshall Greenblatt
parent 8ddb1bffbb
commit fdd36e8461
22 changed files with 922 additions and 550 deletions
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16
include/cef_api_hash.h
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@ -77,19 +77,15 @@
#endif
#endif
#define _CEF_AH_PASTE(a, b, c) a##_##b##_##c
#define _CEF_AH_EVAL(a, b, c) _CEF_AH_PASTE(a, b, c)
#define _CEF_AH_DECLARE(version, suffix) \
_CEF_AH_EVAL(CEF_API_HASH, version, suffix)
#define _CEF_AH_PASTE(a, b) a##_##b
#define _CEF_AH_EVAL(a, b) _CEF_AH_PASTE(a, b)
#define _CEF_AH_DECLARE(version) _CEF_AH_EVAL(CEF_API_HASH, version)
// API hashes for the selected CEF_API_VERSION. API hashes are created for
// each version by analyzing CEF header files for C API type definitions. The
// hash value will change when header files are modified in a way that may
// cause binary incompatibility with other builds. The universal hash value
// will change if any platform is affected whereas the platform hash values
// will change only if that particular platform is affected.
#define CEF_API_HASH_UNIVERSAL _CEF_AH_DECLARE(CEF_API_VERSION, UNIVERSAL)
#define CEF_API_HASH_PLATFORM _CEF_AH_DECLARE(CEF_API_VERSION, PLATFORM)
// cause binary incompatibility with other builds.
#define CEF_API_HASH_PLATFORM _CEF_AH_DECLARE(CEF_API_VERSION)
#if defined(BUILDING_CEF_SHARED)
@ -132,7 +128,7 @@ extern "C" {
/// parameter describes which hash value will be returned:
///
/// 0 - CEF_API_HASH_PLATFORM
/// 1 - CEF_API_HASH_UNIVERSAL
/// 1 - CEF_API_HASH_UNIVERSAL (deprecated, same as CEF_API_HASH_PLATFORM)
/// 2 - CEF_COMMIT_HASH (from cef_version.h)
///
CEF_EXPORT const char* cef_api_hash(int version, int entry);