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Add missing capability attributes for LLVM 12 #8714

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merged 1 commit into from Jun 9, 2021
Merged

Add missing capability attributes for LLVM 12 #8714

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10 changes: 7 additions & 3 deletions src/google/protobuf/stubs/mutex.h
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Expand Up @@ -52,10 +52,12 @@
__attribute__((acquire_capability(__VA_ARGS__)))
#define GOOGLE_PROTOBUF_RELEASE(...) \
__attribute__((release_capability(__VA_ARGS__)))
#define GOOGLE_PROTOBUF_SCOPED_CAPABILITY __attribute__((scoped_lockable))
#define GOOGLE_PROTOBUF_CAPABILITY(x) __attribute__((capability(x)))
#else
#define GOOGLE_PROTOBUF_ACQUIRE(...)
#define GOOGLE_PROTOBUF_RELEASE(...)
#define GOOGLE_PROTOBUF_SCOPED_CAPABILITY
#define GOOGLE_PROTOBUF_CAPABILITY(x)
#endif

Expand Down Expand Up @@ -140,10 +142,12 @@ class GOOGLE_PROTOBUF_CAPABILITY("mutex") PROTOBUF_EXPORT WrappedMutex {
using Mutex = WrappedMutex;

// MutexLock(mu) acquires mu when constructed and releases it when destroyed.
class PROTOBUF_EXPORT MutexLock {
class GOOGLE_PROTOBUF_SCOPED_CAPABILITY PROTOBUF_EXPORT MutexLock {
public:
explicit MutexLock(Mutex *mu) : mu_(mu) { this->mu_->Lock(); }
~MutexLock() { this->mu_->Unlock(); }
explicit MutexLock(Mutex *mu) GOOGLE_PROTOBUF_ACQUIRE(mu) : mu_(mu) {
this->mu_->Lock();
}
~MutexLock() GOOGLE_PROTOBUF_RELEASE() { this->mu_->Unlock(); }
private:
Mutex *const mu_;
GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(MutexLock);
Expand Down