mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
c4abcbefb1
Move include/Config and include/Support into include/llvm/Config, include/llvm/ADT and include/llvm/Support. From here on out, all LLVM public header files must be under include/llvm/. llvm-svn: 16137
66 lines
2.8 KiB
C++
66 lines
2.8 KiB
C++
//===- llvm/Support/SlowOperationInformer.h - Keep user informed *- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by the LLVM research group and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines a simple object which can be used to let the user know what
|
|
// is going on when a slow operation is happening, and gives them the ability to
|
|
// cancel it. Potentially slow operations can stack allocate one of these
|
|
// objects, and periodically call the "progress" method to update the progress
|
|
// bar. If the operation takes more than 1 second to complete, the progress bar
|
|
// is automatically shown and updated. As such, the slow operation should not
|
|
// print stuff to the screen, and should not be confused if an extra line
|
|
// appears on the screen (ie, the cursor should be at the start of the line).
|
|
//
|
|
// If the user presses CTRL-C during the operation, the next invocation of the
|
|
// progress method with throw an std::string object indicating that the
|
|
// operation was cancelled. As such, client code must be exception safe around
|
|
// the progress method.
|
|
//
|
|
// Because SlowOperationInformers fiddle around with signals, they cannot be
|
|
// nested, and interact poorly with threads. The SIGALRM handler is set back to
|
|
// SIGDFL, but the SIGINT signal handler is restored when the
|
|
// SlowOperationInformer is destroyed.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_SUPPORT_SLOW_OPERATION_INFORMER_H
|
|
#define LLVM_SUPPORT_SLOW_OPERATION_INFORMER_H
|
|
|
|
#include <string>
|
|
#include <cassert>
|
|
|
|
namespace llvm {
|
|
class SlowOperationInformer {
|
|
std::string OperationName;
|
|
unsigned LastPrintAmount;
|
|
|
|
SlowOperationInformer(const SlowOperationInformer&); // DO NOT IMPLEMENT
|
|
void operator=(const SlowOperationInformer&); // DO NOT IMPLEMENT
|
|
public:
|
|
SlowOperationInformer(const std::string &Name);
|
|
~SlowOperationInformer();
|
|
|
|
/// progress - Clients should periodically call this method when they are in
|
|
/// an exception-safe state. The Amount variable should indicate how far
|
|
/// along the operation is, given in 1/10ths of a percent (in other words,
|
|
/// Amount should range from 0 to 1000).
|
|
void progress(unsigned Amount);
|
|
|
|
/// progress - Same as the method above, but this performs the division for
|
|
/// you, and helps you avoid overflow if you are dealing with largish
|
|
/// numbers.
|
|
void progress(unsigned Current, unsigned Maximum) {
|
|
assert(Maximum != 0 &&
|
|
"Shouldn't be doing work if there is nothing to do!");
|
|
progress(Current*1000ULL/Maximum);
|
|
}
|
|
};
|
|
} // end namespace llvm
|
|
|
|
#endif /* SLOW_OPERATION_INFORMER_H */
|