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[llvm] Check availability for os_signpost

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Add availability checks to the os_signpost code so this can be used with
an older deployment target.

Differential revision: https://reviews.llvm.org/D97410
This commit is contained in:
Jonas Devlieghere 2021-02-24 16:23:12 -08:00
parent 16955deca8
commit f7b7e8bc87
1 changed files with 23 additions and 10 deletions
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33
lib/Support/Signposts.cpp
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@ -14,12 +14,15 @@
#if LLVM_SUPPORT_XCODE_SIGNPOSTS
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/Mutex.h"
#include <Availability.h>
#include <os/signpost.h>
#endif // if LLVM_SUPPORT_XCODE_SIGNPOSTS
using namespace llvm;
#if LLVM_SUPPORT_XCODE_SIGNPOSTS
#define SIGNPOSTS_AVAILABLE() \
__builtin_available(macos 10.14, iOS 12, tvOS 12, watchOS 5, *)
namespace {
os_log_t *LogCreator() {
os_log_t *X = new os_log_t;
@ -47,30 +50,40 @@ class SignpostEmitterImpl {
const auto &I = Signposts.find(O);
if (I != Signposts.end())
return I->second;
const auto &Inserted = Signposts.insert(
std::make_pair(O, os_signpost_id_make_with_pointer(getLogger(), O)));
os_signpost_id_t ID = {};
if (SIGNPOSTS_AVAILABLE()) {
ID = os_signpost_id_make_with_pointer(getLogger(), O);
}
const auto &Inserted = Signposts.insert(std::make_pair(O, ID));
return Inserted.first->second;
}
public:
SignpostEmitterImpl() : SignpostLog(LogCreator(), LogDeleter), Signposts() {}
bool isEnabled() const { return os_signpost_enabled(*SignpostLog); }
bool isEnabled() const {
if (SIGNPOSTS_AVAILABLE())
return os_signpost_enabled(*SignpostLog);
return false;
}
void startInterval(const void *O, llvm::StringRef Name) {
if (isEnabled()) {
// Both strings used here are required to be constant literal strings.
os_signpost_interval_begin(getLogger(), getSignpostForObject(O),
"LLVM Timers", "Begin %s", Name.data());
if (SIGNPOSTS_AVAILABLE()) {
// Both strings used here are required to be constant literal strings.
os_signpost_interval_begin(getLogger(), getSignpostForObject(O),
"LLVM Timers", "Begin %s", Name.data());
}
}
}
void endInterval(const void *O, llvm::StringRef Name) {
if (isEnabled()) {
// Both strings used here are required to be constant literal strings.
os_signpost_interval_end(getLogger(), getSignpostForObject(O),
"LLVM Timers", "End %s", Name.data());
if (SIGNPOSTS_AVAILABLE()) {
// Both strings used here are required to be constant literal strings.
os_signpost_interval_end(getLogger(), getSignpostForObject(O),
"LLVM Timers", "End %s", Name.data());
}
}
}
};