mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
59629c1d8b
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75055 91177308-0d34-0410-b5e6-96231b3b80d8
132 lines
7.0 KiB
C++
132 lines
7.0 KiB
C++
//===- llvm/System/Program.h ------------------------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file declares the llvm::sys::Program class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_SYSTEM_PROGRAM_H
|
|
#define LLVM_SYSTEM_PROGRAM_H
|
|
|
|
#include "llvm/System/Path.h"
|
|
|
|
namespace llvm {
|
|
namespace sys {
|
|
|
|
/// This class provides an abstraction for programs that are executable by the
|
|
/// operating system. It provides a platform generic way to find executable
|
|
/// programs from the path and to execute them in various ways. The sys::Path
|
|
/// class is used to specify the location of the Program.
|
|
/// @since 1.4
|
|
/// @brief An abstraction for finding and executing programs.
|
|
class Program {
|
|
/// @name Methods
|
|
/// @{
|
|
public:
|
|
/// This static constructor (factory) will attempt to locate a program in
|
|
/// the operating system's file system using some pre-determined set of
|
|
/// locations to search (e.g. the PATH on Unix).
|
|
/// @returns A Path object initialized to the path of the program or a
|
|
/// Path object that is empty (invalid) if the program could not be found.
|
|
/// @throws nothing
|
|
/// @brief Construct a Program by finding it by name.
|
|
static Path FindProgramByName(const std::string& name);
|
|
|
|
/// This function executes the program using the \p arguments provided and
|
|
/// waits for the program to exit. This function will block the current
|
|
/// program until the invoked program exits. The invoked program will
|
|
/// inherit the stdin, stdout, and stderr file descriptors, the
|
|
/// environment and other configuration settings of the invoking program.
|
|
/// If Path::executable() does not return true when this function is
|
|
/// called then a std::string is thrown.
|
|
/// @returns an integer result code indicating the status of the program.
|
|
/// A zero or positive value indicates the result code of the program. A
|
|
/// negative value is the signal number on which it terminated.
|
|
/// @see FindProgrambyName
|
|
/// @brief Executes the program with the given set of \p args.
|
|
static int ExecuteAndWait(
|
|
const Path& path, ///< sys::Path object providing the path of the
|
|
///< program to be executed. It is presumed this is the result of
|
|
///< the FindProgramByName method.
|
|
const char** args, ///< A vector of strings that are passed to the
|
|
///< program. The first element should be the name of the program.
|
|
///< The list *must* be terminated by a null char* entry.
|
|
const char ** env = 0, ///< An optional vector of strings to use for
|
|
///< the program's environment. If not provided, the current program's
|
|
///< environment will be used.
|
|
const sys::Path** redirects = 0, ///< An optional array of pointers to
|
|
///< Paths. If the array is null, no redirection is done. The array
|
|
///< should have a size of at least three. If the pointer in the array
|
|
///< are not null, then the inferior process's stdin(0), stdout(1),
|
|
///< and stderr(2) will be redirected to the corresponding Paths.
|
|
///< When an empty Path is passed in, the corresponding file
|
|
///< descriptor will be disconnected (ie, /dev/null'd) in a portable
|
|
///< way.
|
|
unsigned secondsToWait = 0, ///< If non-zero, this specifies the amount
|
|
///< of time to wait for the child process to exit. If the time
|
|
///< expires, the child is killed and this call returns. If zero,
|
|
///< this function will wait until the child finishes or forever if
|
|
///< it doesn't.
|
|
unsigned memoryLimit = 0, ///< If non-zero, this specifies max. amount
|
|
///< of memory can be allocated by process. If memory usage will be
|
|
///< higher limit, the child is killed and this call returns. If zero
|
|
///< - no memory limit.
|
|
std::string* ErrMsg = 0 ///< If non-zero, provides a pointer to a string
|
|
///< instance in which error messages will be returned. If the string
|
|
///< is non-empty upon return an error occurred while invoking the
|
|
///< program.
|
|
);
|
|
// These methods change the specified standard stream (stdin or stdout) to
|
|
// binary mode. They return true if an error occurred
|
|
static bool ChangeStdinToBinary();
|
|
static bool ChangeStdoutToBinary();
|
|
/// @}
|
|
|
|
/// This function executes the program using the \p arguments provided and
|
|
/// waits for the program to exit. This function will block the current
|
|
/// program until the invoked program exits. The invoked program will
|
|
/// inherit the stdin, stdout, and stderr file descriptors, the
|
|
/// environment and other configuration settings of the invoking program.
|
|
/// If Path::executable() does not return true when this function is
|
|
/// called then a std::string is thrown.
|
|
/// @returns an integer result code indicating the status of the program.
|
|
/// A zero or positive value indicates the result code of the program. A
|
|
/// negative value is the signal number on which it terminated.
|
|
/// @see FindProgrambyName
|
|
/// @brief Executes the program with the given set of \p args.
|
|
static void ExecuteNoWait(
|
|
const Path& path, ///< sys::Path object providing the path of the
|
|
///< program to be executed. It is presumed this is the result of
|
|
///< the FindProgramByName method.
|
|
const char** args, ///< A vector of strings that are passed to the
|
|
///< program. The first element should be the name of the program.
|
|
///< The list *must* be terminated by a null char* entry.
|
|
const char ** env = 0, ///< An optional vector of strings to use for
|
|
///< the program's environment. If not provided, the current program's
|
|
///< environment will be used.
|
|
const sys::Path** redirects = 0, ///< An optional array of pointers to
|
|
///< Paths. If the array is null, no redirection is done. The array
|
|
///< should have a size of at least three. If the pointer in the array
|
|
///< are not null, then the inferior process's stdin(0), stdout(1),
|
|
///< and stderr(2) will be redirected to the corresponding Paths.
|
|
unsigned memoryLimit = 0, ///< If non-zero, this specifies max. amount
|
|
///< of memory can be allocated by process. If memory usage will be
|
|
///< higher limit, the child is killed and this call returns. If zero -
|
|
///< no memory limit.
|
|
std::string* ErrMsg = 0 ///< If non-zero, provides a pointer to a string
|
|
///< instance in which error messages will be returned. If the string
|
|
///< is non-empty upon return an error occurred while invoking the
|
|
///< program.
|
|
);
|
|
};
|
|
}
|
|
}
|
|
|
|
#endif
|