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factorize signal registration, part of PR3848.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67508 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-03-23 05:42:29 +00:00
parent 3aff0a63f9
commit 1c4d8a00ab
1 changed files with 24 additions and 11 deletions
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35
lib/System/Unix/Signals.inc
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@ -31,6 +31,8 @@
#endif
using namespace llvm;
static RETSIGTYPE SignalHandler(int Sig); // defined below.
/// InterruptFunction - The function to call if ctrl-c is pressed.
static void (*InterruptFunction)() = 0;
@ -55,10 +57,26 @@ static const int KillSigs[] = {
static const int *const KillSigsEnd =
KillSigs + sizeof(KillSigs) / sizeof(KillSigs[0]);
static void UnregisterHandler(int Signal) {
signal(Signal, SIG_DFL);
// Just call signal
static void RegisterHandler(int Signal) {
signal(Signal, SignalHandler);
}
static void RegisterHandlers() {
std::for_each(IntSigs, IntSigsEnd, RegisterHandler);
std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
}
static void UnregisterHandler(int Signal) {
signal(Signal, SIG_DFL);
}
static void UnregisterHandlers() {
std::for_each(KillSigs, KillSigsEnd, UnregisterHandler);
std::for_each(IntSigs, IntSigsEnd, UnregisterHandler);
}
// SignalHandler - The signal handler that runs.
static RETSIGTYPE SignalHandler(int Sig) {
@ -66,7 +84,7 @@ static RETSIGTYPE SignalHandler(int Sig) {
// crashes when we return and the signal reissues. This also ensures that if
// we crash in our signal handler that the program will terminate immediately
// instead of recursing in the signal handler.
std::for_each(KillSigs, KillSigsEnd, UnregisterHandler);
UnregisterHandlers();
// Unmask all potentially blocked kill signals.
sigset_t SigMask;
@ -95,15 +113,11 @@ static RETSIGTYPE SignalHandler(int Sig) {
(*CallBacksToRun)[i].first((*CallBacksToRun)[i].second);
}
// Just call signal
static void RegisterHandler(int Signal) {
signal(Signal, SignalHandler);
}
void llvm::sys::SetInterruptFunction(void (*IF)()) {
InterruptFunction = IF;
RegisterHandler(SIGINT);
RegisterHandlers();
}
// RemoveFileOnSignal - The public API
@ -114,8 +128,7 @@ bool llvm::sys::RemoveFileOnSignal(const sys::Path &Filename,
FilesToRemove->push_back(Filename);
std::for_each(IntSigs, IntSigsEnd, RegisterHandler);
std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
RegisterHandlers();
return false;
}
@ -126,7 +139,7 @@ void llvm::sys::AddSignalHandler(void (*FnPtr)(void *), void *Cookie) {
if (CallBacksToRun == 0)
CallBacksToRun = new std::vector<std::pair<void(*)(void*), void*> >();
CallBacksToRun->push_back(std::make_pair(FnPtr, Cookie));
std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
RegisterHandlers();
}