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Diffstat (limited to 'include/llvm/System/Program.h')
| -rw-r--r-- | include/llvm/System/Program.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/include/llvm/System/Program.h b/include/llvm/System/Program.h new file mode 100644 index 0000000000000..37f55466a50d7 --- /dev/null +++ b/include/llvm/System/Program.h @@ -0,0 +1,94 @@ +//===- 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(); + /// @} + }; +} +} + +#endif |
