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06ad3a75b6
Implement process launching on Windows to support macros. Prefer to use the LLVM types wherever possible. The pipes are converted into file descriptors as the types are internal to the process. This allows us to have similar paths on both sides and avoid having to drag in `Windows.h` for the definition of `HANDLE`. This is the core missing functionality for Windows to support macros.
68 lines
2.7 KiB
C++
68 lines
2.7 KiB
C++
//===--- Program.h ----------------------------------------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_BASIC_PROGRAM_H
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#define SWIFT_BASIC_PROGRAM_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/ErrorOr.h"
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#include "llvm/Support/Program.h"
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namespace swift {
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/// This function executes the program using the arguments provided,
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/// preferring to reexecute the current process, if supported.
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///
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/// \param Program Path of the program to be executed
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/// \param args A vector of strings that are passed to the program. The first
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/// element should be the name of the program. The list *must* be terminated by
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/// a null char * entry.
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/// \param env An optional vector of strings to use for the program's
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/// environment. If not provided, the current program's environment will be
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/// used.
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///
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/// \returns Typically, this function will not return, as the current process
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/// will no longer exist, or it will call exit() if the program was successfully
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/// executed. In the event of an error, this function will return a negative
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/// value indicating a failure to execute.
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int ExecuteInPlace(const char *Program, const char **args,
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const char **env = nullptr);
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struct ChildProcessInfo {
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llvm::sys::ProcessInfo ProcessInfo;
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int Write;
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int Read;
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ChildProcessInfo(llvm::sys::ProcessInfo ProcessInfo, int Write, int Read)
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: ProcessInfo(ProcessInfo), Write(Write), Read(Read) {}
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};
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/// This function executes the program using the argument provided.
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/// Establish pipes between the current process and the spawned process.
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/// Returned a \c ChildProcessInfo where WriteFileDescriptor is piped to
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/// child's STDIN, and ReadFileDescriptor is piped from child's STDOUT.
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///
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/// \param program Path of the program to be executed
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/// \param args An array of strings that are passed to the program. The first
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/// element should be the name of the program.
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/// \param env An optional array of 'key=value 'strings to use for the program's
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/// environment.
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llvm::ErrorOr<swift::ChildProcessInfo> ExecuteWithPipe(
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llvm::StringRef program, llvm::ArrayRef<llvm::StringRef> args,
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llvm::Optional<llvm::ArrayRef<llvm::StringRef>> env = llvm::None);
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} // end namespace swift
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#endif // SWIFT_BASIC_PROGRAM_H
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