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ab2172cc97
Added swift::ExecuteInPlace(), which on Unix acts as a wrapper for execv() and execve(). On other platforms, swift::ExecuteInPlace() is a wrapper for llvm::sys::ExecuteAndWait(), so callers must be prepared for ExecuteInPlace() to return in a non-error situation. Added support in Compilation::performJobs() to detect that the Compilation has exactly one Command to run. If that's the case, and buffered output isn't required, execute that Command using swift::ExecuteInPlace() (instead of creating a TaskQueue, which may unconditionally buffer output). This change will allow the driver to invoke the frontend's REPL and immediate modes without buffering output (and, on Unix, without a separate process being spawned). Also updated test/Driver/basic.swift to emit output with these changes in place. Swift SVN r12544
43 lines
1.7 KiB
C++
43 lines
1.7 KiB
C++
//===- swift/Basic/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 - 2015 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 http://swift.org/LICENSE.txt for license information
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// See http://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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namespace swift {
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/// \brief 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 If this process was reexecuted as the given program, this function
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/// will not return. Otherwise, -1 indicates a failure to execute, and other
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/// values are the result code of the program.
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///
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/// \note If the current process cannot be reexecuted as the given program,
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/// this function will defer to \ref llvm::sys::ExecuteAndWait(), so callers
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/// must be prepared to resume normal execution if this function returns a
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/// non-negative value.
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int ExecuteInPlace(const char *Program, const char **args,
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const char **env = nullptr);
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} // end namespace swift
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#endif
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