mirror of
https://github.com/chromium/crashpad.git
synced 2024-12-27 15:32:10 +08:00
6278690abe
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>
122 lines
4.6 KiB
C++
122 lines
4.6 KiB
C++
// 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_GET_FUNCTION_H_
|
||
#define CRASHPAD_UTIL_WIN_GET_FUNCTION_H_
|
||
|
||
#include <windows.h>
|
||
|
||
//! \file
|
||
|
||
namespace crashpad {
|
||
namespace internal {
|
||
|
||
//! \brief Returns a function pointer to a named function in a library.
|
||
//!
|
||
//! Do not call this directly, use the GET_FUNCTION() or GET_FUNCTION_REQUIRED()
|
||
//! macros instead.
|
||
//!
|
||
//! This accesses \a library by calling `LoadLibrary()` and is subject to the
|
||
//! same restrictions as that function. Notably, it can’t be used from a
|
||
//! `DllMain()` entry point.
|
||
//!
|
||
//! \param[in] library The library to search in.
|
||
//! \param[in] function The function to search for. If a leading `::` is
|
||
//! present, it will be stripped.
|
||
//! \param[in] required If `true`, require the function to resolve by `DCHECK`.
|
||
//!
|
||
//! \return A pointer to the requested function on success. If \a required is
|
||
//! `true`, triggers a `DCHECK` assertion on failure, otherwise, `nullptr`
|
||
//! on failure.
|
||
FARPROC GetFunctionInternal(
|
||
const wchar_t* library, const char* function, bool required);
|
||
|
||
//! \copydoc GetFunctionInternal
|
||
template <typename FunctionType>
|
||
FunctionType* GetFunction(
|
||
const wchar_t* library, const char* function, bool required) {
|
||
return reinterpret_cast<FunctionType*>(
|
||
internal::GetFunctionInternal(library, function, required));
|
||
}
|
||
|
||
} // namespace internal
|
||
} // namespace crashpad
|
||
|
||
//! \brief Returns a function pointer to a named function in a library without
|
||
//! requiring that it be found.
|
||
//!
|
||
//! If the library or function cannot be found, this will return `nullptr`. This
|
||
//! macro is intended to be used to access functions that may not be available
|
||
//! at runtime.
|
||
//!
|
||
//! This macro returns a properly-typed function pointer. It is expected to be
|
||
//! used in this way:
|
||
//! \code
|
||
//! static const auto get_named_pipe_client_process_id =
|
||
//! GET_FUNCTION(L"kernel32.dll", ::GetNamedPipeClientProcessId);
|
||
//! if (get_named_pipe_client_process_id) {
|
||
//! BOOL rv = get_named_pipe_client_process_id(pipe, &client_process_id);
|
||
//! }
|
||
//! \endcode
|
||
//!
|
||
//! This accesses \a library by calling `LoadLibrary()` and is subject to the
|
||
//! same restrictions as that function. Notably, it can’t be used from a
|
||
//! `DllMain()` entry point.
|
||
//!
|
||
//! \param[in] library The library to search in.
|
||
//! \param[in] function The function to search for. A leading `::` is
|
||
//! recommended when a wrapper function of the same name is present.
|
||
//!
|
||
//! \return A pointer to the requested function on success, or `nullptr` on
|
||
//! failure.
|
||
//!
|
||
//! \sa GET_FUNCTION_REQUIRED
|
||
#define GET_FUNCTION(library, function) \
|
||
crashpad::internal::GetFunction<decltype(function)>( \
|
||
library, #function, false)
|
||
|
||
//! \brief Returns a function pointer to a named function in a library,
|
||
//! requiring that it be found.
|
||
//!
|
||
//! If the library or function cannot be found, this will trigger a `DCHECK`
|
||
//! assertion. This macro is intended to be used to access functions that are
|
||
//! always expected to be available at runtime but which are not present in any
|
||
//! import library.
|
||
//!
|
||
//! This macro returns a properly-typed function pointer. It is expected to be
|
||
//! used in this way:
|
||
//! \code
|
||
//! static const auto nt_query_object =
|
||
//! GET_FUNCTION_REQUIRED(L"ntdll.dll", ::NtQueryObject);
|
||
//! NTSTATUS status =
|
||
//! nt_query_object(handle, type, &info, info_length, &return_length);
|
||
//! \endcode
|
||
//!
|
||
//! This accesses \a library by calling `LoadLibrary()` and is subject to the
|
||
//! same restrictions as that function. Notably, it can’t be used from a
|
||
//! `DllMain()` entry point.
|
||
//!
|
||
//! \param[in] library The library to search in.
|
||
//! \param[in] function The function to search for. A leading `::` is
|
||
//! recommended when a wrapper function of the same name is present.
|
||
//!
|
||
//! \return A pointer to the requested function.
|
||
//!
|
||
//! \sa GET_FUNCTION
|
||
#define GET_FUNCTION_REQUIRED(library, function) \
|
||
crashpad::internal::GetFunction<decltype(function)>( \
|
||
library, #function, true)
|
||
|
||
#endif // CRASHPAD_UTIL_WIN_GET_FUNCTION_H_
|