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-rw-r--r--include/llvm/Support/SlowOperationInformer.h65
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diff --git a/include/llvm/Support/SlowOperationInformer.h b/include/llvm/Support/SlowOperationInformer.h
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--- a/include/llvm/Support/SlowOperationInformer.h
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-//===- llvm/Support/SlowOperationInformer.h - Keep user informed *- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file 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 return true indicating that the operation was cancelled.
-//
-// 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>
-#include "llvm/System/DataTypes.h"
-
-namespace llvm {
- class SlowOperationInformer {
- std::string OperationName;
- unsigned LastPrintAmount;
-
- SlowOperationInformer(const SlowOperationInformer&); // DO NOT IMPLEMENT
- void operator=(const SlowOperationInformer&); // DO NOT IMPLEMENT
- public:
- explicit SlowOperationInformer(const std::string &Name);
- ~SlowOperationInformer();
-
- /// progress - Clients should periodically call this method when they can
- /// handle cancellation. 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). If the user cancels the operation,
- /// this returns true, false otherwise.
- bool 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.
- bool progress(unsigned Current, unsigned Maximum) {
- assert(Maximum != 0 &&
- "Shouldn't be doing work if there is nothing to do!");
- return progress(Current*uint64_t(1000UL)/Maximum);
- }
- };
-} // end namespace llvm
-
-#endif /* SLOW_OPERATION_INFORMER_H */