crashpad/util/win/handle.h
Mark Mentovai 6278690abe Update copyright boilerplate, 2022 edition (Crashpad)
sed -i '' -E -e 's/Copyright (.+) The Crashpad Authors\. All rights reserved\.$/Copyright \1 The Crashpad Authors/' $(git grep -El 'Copyright (.+) The Crashpad Authors\. All rights reserved\.$')

Bug: chromium:1098010
Change-Id: I8d6138469ddbe3d281a5d83f64cf918ec2491611
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3878262
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
2022-09-06 23:54:07 +00:00

66 lines
2.5 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

// Copyright 2015 The Crashpad Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef CRASHPAD_UTIL_WIN_HANDLE_TO_INT_H_
#define CRASHPAD_UTIL_WIN_HANDLE_TO_INT_H_
#include <windows.h>
namespace crashpad {
//! \brief Converts a `HANDLE` to an `int`.
//!
//! `HANDLE` is a `typedef` for `void *`, but kernel `HANDLE` values arent
//! pointers to anything. Only 32 bits of kernel `HANDLE`s are significant, even
//! in 64-bit processes on 64-bit operating systems. See <a
//! href="https://msdn.microsoft.com/library/aa384203.aspx">Interprocess
//! Communication Between 32-bit and 64-bit Applications</a>.
//!
//! This function safely converts a kernel `HANDLE` to an `int` similarly to a
//! cast operation. It checks that the operation can be performed safely, and
//! aborts execution if it cannot.
//!
//! \param[in] handle The kernel `HANDLE` to convert.
//!
//! \return An equivalent `int`, truncated (if necessary) from \a handle. If
//! truncation would have resulted in an `int` that could not be converted
//! back to \a handle, aborts execution.
//!
//! \sa IntToHandle()
int HandleToInt(HANDLE handle);
//! \brief Converts an `int` to an `HANDLE`.
//!
//! `HANDLE` is a `typedef` for `void *`, but kernel `HANDLE` values arent
//! pointers to anything. Only 32 bits of kernel `HANDLE`s are significant, even
//! in 64-bit processes on 64-bit operating systems. See <a
//! href="https://msdn.microsoft.com/library/aa384203.aspx">Interprocess
//! Communication Between 32-bit and 64-bit Applications</a>.
//!
//! This function safely convert an `int` to a kernel `HANDLE` similarly to a
//! cast operation.
//!
//! \param[in] handle_int The `int` to convert. This must have been produced by
//! HandleToInt(), possibly in a different process.
//!
//! \return An equivalent kernel `HANDLE`, sign-extended (if necessary) from \a
//! handle_int.
//!
//! \sa HandleToInt()
HANDLE IntToHandle(int handle_int);
} // namespace crashpad
#endif // CRASHPAD_UTIL_WIN_HANDLE_TO_INT_H_