Add llvm::function_ref (and a couple of uses of it), representing a type-erased reference to a callable object.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208025 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 7 deletions

diff --git a/lib/Support/CrashRecoveryContext.cpp b/lib/Support/CrashRecoveryContext.cpp
index 513875d4de..a426377042 100644
--- a/lib/Support/CrashRecoveryContext.cpp
+++ b/lib/Support/CrashRecoveryContext.cpp
@@ -301,7 +301,7 @@ void CrashRecoveryContext::Disable() {
 
 #endif
 
-bool CrashRecoveryContext::RunSafely(void (*Fn)(void*), void *UserData) {
+bool CrashRecoveryContext::RunSafely(function_ref<void()> Fn) {
   // If crash recovery is disabled, do nothing.
   if (gCrashRecoveryEnabled) {
     assert(!Impl && "Crash recovery context already initialized!");
@@ -313,7 +313,7 @@ bool CrashRecoveryContext::RunSafely(void (*Fn)(void*), void *UserData) {
     }
   }
 
-  Fn(UserData);
+  Fn();
   return true;
 }
 
@@ -334,8 +334,7 @@ const std::string &CrashRecoveryContext::getBacktrace() const {
 
 namespace {
 struct RunSafelyOnThreadInfo {
-  void (*Fn)(void*);
-  void *Data;
+  function_ref<void()> Fn;
   CrashRecoveryContext *CRC;
   bool Result;
 };
@@ -344,11 +343,11 @@ struct RunSafelyOnThreadInfo {
 static void RunSafelyOnThread_Dispatch(void *UserData) {
   RunSafelyOnThreadInfo *Info =
     reinterpret_cast<RunSafelyOnThreadInfo*>(UserData);
-  Info->Result = Info->CRC->RunSafely(Info->Fn, Info->Data);
+  Info->Result = Info->CRC->RunSafely(Info->Fn);
 }
-bool CrashRecoveryContext::RunSafelyOnThread(void (*Fn)(void*), void *UserData,
+bool CrashRecoveryContext::RunSafelyOnThread(function_ref<void()> Fn,
                                              unsigned RequestedStackSize) {
-  RunSafelyOnThreadInfo Info = { Fn, UserData, this, false };
+  RunSafelyOnThreadInfo Info = { Fn, this, false };
   llvm_execute_on_thread(RunSafelyOnThread_Dispatch, &Info, RequestedStackSize);
   if (CrashRecoveryContextImpl *CRC = (CrashRecoveryContextImpl *)Impl)
     CRC->setSwitchedThread();