Helper class for managing resource cleanups. More...

#include "llvm/Support/CrashRecoveryContext.h"

Public Member Functions
	CrashRecoveryContextCleanupRegistrar (T *x)

	~CrashRecoveryContextCleanupRegistrar ()

void	unregister ()

Detailed Description

template<typename T, typename Cleanup = CrashRecoveryContextDeleteCleanup<T>>
class llvm::CrashRecoveryContextCleanupRegistrar< T, Cleanup >

Helper class for managing resource cleanups.

Template Parameters

T	Type of resource been reclaimed.
Cleanup	Class that defines how the resource is reclaimed.

Clients create objects of this type in the code executed in a crash recovery context to ensure that the resource will be reclaimed even in the case of crash. For example:

void actual_work(void *) {
  ...
  std::unique_ptr<Resource> R(new Resource());
  CrashRecoveryContextCleanupRegistrar D(R.get());
  ...
}
 
void foo() {
  CrashRecoveryContext CRC;
 
  if (!CRC.RunSafely(actual_work, 0)) {
     ... a crash was detected, report error to user ...
  }

If the code of actual_work in the example above does not crash, the destructor of CrashRecoveryContextCleanupRegistrar removes cleanup code from the current CrashRecoveryContext and the resource is reclaimed by the destructor of std::unique_ptr. If crash happens, destructors are not called and the resource is reclaimed by cleanup object registered in the recovery context by the constructor of CrashRecoveryContextCleanupRegistrar.

Definition at line 252 of file CrashRecoveryContext.h.