[llvm-profdata] Add SaturatingAdd/SaturatingMultiply Helper Functions

[oota-llvm.git] / include / llvm / Support / CrashRecoveryContext.h

diff --git a/include/llvm/Support/CrashRecoveryContext.h b/include/llvm/Support/CrashRecoveryContext.h
index aa5e55eeab47c71da9596862cf6a250dcc4f94f8..1a1c74368761d729c8d60d76260425618388cb24 100644 (file)
--- a/include/llvm/Support/CrashRecoveryContext.h
+++ b/include/llvm/Support/CrashRecoveryContext.h
@@ -10,14 +10,12 @@
 #ifndef LLVM_SUPPORT_CRASHRECOVERYCONTEXT_H
 #define LLVM_SUPPORT_CRASHRECOVERYCONTEXT_H
 
-#include <functional>
+#include "llvm/ADT/STLExtras.h"
 #include <string>
 
 namespace llvm {
-class StringRef;
-
 class CrashRecoveryContextCleanup;
-  
+
 /// \brief Crash recovery helper object.
 ///
 /// This class implements support for running operations in a safe context so
@@ -41,16 +39,14 @@ class CrashRecoveryContextCleanup;
 ///
 ///      ... no crash was detected ...
 ///    }
-///
-/// Crash recovery contexts may not be nested.
 class CrashRecoveryContext {
   void *Impl;
   CrashRecoveryContextCleanup *head;
 
 public:
-  CrashRecoveryContext() : Impl(0), head(0) {}
+  CrashRecoveryContext() : Impl(nullptr), head(nullptr) {}
   ~CrashRecoveryContext();
-  
+
   void registerCleanup(CrashRecoveryContextCleanup *cleanup);
   void unregisterCleanup(CrashRecoveryContextCleanup *cleanup);
 
@@ -76,18 +72,24 @@ public:
   /// make as little assumptions as possible about the program state when
   /// RunSafely has returned false. Clients can use getBacktrace() to retrieve
   /// the backtrace of the crash on failures.
-  bool RunSafely(std::function<void()> Fn);
-  bool RunSafely(void (*Fn)(void*), void *UserData);
+  bool RunSafely(function_ref<void()> Fn);
+  bool RunSafely(void (*Fn)(void*), void *UserData) {
+    return RunSafely([&]() { Fn(UserData); });
+  }
 
   /// \brief Execute the provide callback function (with the given arguments) in
   /// a protected context which is run in another thread (optionally with a
   /// requested stack size).
   ///
   /// See RunSafely() and llvm_execute_on_thread().
+  ///
+  /// On Darwin, if PRIO_DARWIN_BG is set on the calling thread, it will be
+  /// propagated to the new thread as well.
+  bool RunSafelyOnThread(function_ref<void()>, unsigned RequestedStackSize = 0);
   bool RunSafelyOnThread(void (*Fn)(void*), void *UserData,
-                         unsigned RequestedStackSize = 0);
-  bool RunSafelyOnThread(std::function<void()> Fn,
-                         unsigned RequestedStackSize = 0);
+                         unsigned RequestedStackSize = 0) {
+    return RunSafelyOnThread([&]() { Fn(UserData); }, RequestedStackSize);
+  }
 
   /// \brief Explicitly trigger a crash recovery in the current process, and
   /// return failure from RunSafely(). This function does not return.
@@ -105,10 +107,11 @@ class CrashRecoveryContextCleanup {
 protected:
   CrashRecoveryContext *context;
   CrashRecoveryContextCleanup(CrashRecoveryContext *context)
-    : context(context), cleanupFired(false) {}
+      : context(context), cleanupFired(false) {}
+
 public:
   bool cleanupFired;
-  
+
   virtual ~CrashRecoveryContextCleanup();
   virtual void recoverResources() = 0;
 
@@ -125,15 +128,16 @@ template<typename DERIVED, typename T>
 class CrashRecoveryContextCleanupBase : public CrashRecoveryContextCleanup {
 protected:
   T *resource;
-  CrashRecoveryContextCleanupBase(CrashRecoveryContext *context, T* resource)
-    : CrashRecoveryContextCleanup(context), resource(resource) {}
+  CrashRecoveryContextCleanupBase(CrashRecoveryContext *context, T *resource)
+      : CrashRecoveryContextCleanup(context), resource(resource) {}
+
 public:
   static DERIVED *create(T *x) {
     if (x) {
       if (CrashRecoveryContext *context = CrashRecoveryContext::GetCurrent())
         return new DERIVED(context, x);
     }
-    return 0;
+    return nullptr;
   }
 };
 
@@ -142,9 +146,9 @@ class CrashRecoveryContextDestructorCleanup : public
   CrashRecoveryContextCleanupBase<CrashRecoveryContextDestructorCleanup<T>, T> {
 public:
   CrashRecoveryContextDestructorCleanup(CrashRecoveryContext *context,
-                                        T *resource) 
-    : CrashRecoveryContextCleanupBase<
-        CrashRecoveryContextDestructorCleanup<T>, T>(context, resource) {}
+                                        T *resource)
+      : CrashRecoveryContextCleanupBase<
+            CrashRecoveryContextDestructorCleanup<T>, T>(context, resource) {}
 
   virtual void recoverResources() {
     this->resource->~T();
@@ -159,9 +163,7 @@ public:
     : CrashRecoveryContextCleanupBase<
         CrashRecoveryContextDeleteCleanup<T>, T>(context, resource) {}
 
-  virtual void recoverResources() {
-    delete this->resource;
-  }  
+  void recoverResources() override { delete this->resource; }
 };
 
 template <typename T>
@@ -169,19 +171,18 @@ class CrashRecoveryContextReleaseRefCleanup : public
   CrashRecoveryContextCleanupBase<CrashRecoveryContextReleaseRefCleanup<T>, T>
 {
 public:
-  CrashRecoveryContextReleaseRefCleanup(CrashRecoveryContext *context, 
+  CrashRecoveryContextReleaseRefCleanup(CrashRecoveryContext *context,
                                         T *resource)
     : CrashRecoveryContextCleanupBase<CrashRecoveryContextReleaseRefCleanup<T>,
           T>(context, resource) {}
 
-  virtual void recoverResources() {
-    this->resource->Release();
-  }
+  void recoverResources() override { this->resource->Release(); }
 };
 
 template <typename T, typename Cleanup = CrashRecoveryContextDeleteCleanup<T> >
 class CrashRecoveryContextCleanupRegistrar {
   CrashRecoveryContextCleanup *cleanup;
+
 public:
   CrashRecoveryContextCleanupRegistrar(T *x)
     : cleanup(Cleanup::create(x)) {
@@ -189,16 +190,14 @@ public:
       cleanup->getContext()->registerCleanup(cleanup);
   }
 
-  ~CrashRecoveryContextCleanupRegistrar() {
-    unregister();
-  }
-  
+  ~CrashRecoveryContextCleanupRegistrar() { unregister(); }
+
   void unregister() {
     if (cleanup && !cleanup->cleanupFired)
       cleanup->getContext()->unregisterCleanup(cleanup);
-    cleanup = 0;
+    cleanup = nullptr;
   }
 };
-}
+} // end namespace llvm
 
-#endif
+#endif // LLVM_SUPPORT_CRASHRECOVERYCONTEXT_H