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from LLVM forever: grep -lR "llvm/System" * | grep -v .svn | xargs sed -ie 's#llvm/System#llvm/Support#g' llvm-svn: 120314
147 lines
6.3 KiB
C++
147 lines
6.3 KiB
C++
//===- llvm/Support/Process.h ------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the llvm::sys::Process class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SYSTEM_PROCESS_H
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#define LLVM_SYSTEM_PROCESS_H
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#include "llvm/Support/TimeValue.h"
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namespace llvm {
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namespace sys {
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/// This class provides an abstraction for getting information about the
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/// currently executing process.
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/// @since 1.4
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/// @brief An abstraction for operating system processes.
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class Process {
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/// @name Accessors
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/// @{
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public:
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/// This static function will return the operating system's virtual memory
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/// page size.
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/// @returns The number of bytes in a virtual memory page.
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/// @brief Get the virtual memory page size
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static unsigned GetPageSize();
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/// This static function will return the total amount of memory allocated
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/// by the process. This only counts the memory allocated via the malloc,
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/// calloc and realloc functions and includes any "free" holes in the
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/// allocated space.
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/// @brief Return process memory usage.
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static size_t GetMallocUsage();
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/// This static function will return the total memory usage of the
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/// process. This includes code, data, stack and mapped pages usage. Notei
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/// that the value returned here is not necessarily the Running Set Size,
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/// it is the total virtual memory usage, regardless of mapped state of
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/// that memory.
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static size_t GetTotalMemoryUsage();
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/// This static function will set \p user_time to the amount of CPU time
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/// spent in user (non-kernel) mode and \p sys_time to the amount of CPU
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/// time spent in system (kernel) mode. If the operating system does not
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/// support collection of these metrics, a zero TimeValue will be for both
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/// values.
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static void GetTimeUsage(
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TimeValue& elapsed,
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///< Returns the TimeValue::now() giving current time
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TimeValue& user_time,
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///< Returns the current amount of user time for the process
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TimeValue& sys_time
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///< Returns the current amount of system time for the process
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);
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/// This static function will return the process' current user id number.
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/// Not all operating systems support this feature. Where it is not
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/// supported, the function should return 65536 as the value.
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static int GetCurrentUserId();
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/// This static function will return the process' current group id number.
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/// Not all operating systems support this feature. Where it is not
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/// supported, the function should return 65536 as the value.
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static int GetCurrentGroupId();
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/// This function makes the necessary calls to the operating system to
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/// prevent core files or any other kind of large memory dumps that can
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/// occur when a program fails.
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/// @brief Prevent core file generation.
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static void PreventCoreFiles();
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/// This function determines if the standard input is connected directly
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/// to a user's input (keyboard probably), rather than coming from a file
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/// or pipe.
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static bool StandardInIsUserInput();
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/// This function determines if the standard output is connected to a
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/// "tty" or "console" window. That is, the output would be displayed to
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/// the user rather than being put on a pipe or stored in a file.
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static bool StandardOutIsDisplayed();
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/// This function determines if the standard error is connected to a
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/// "tty" or "console" window. That is, the output would be displayed to
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/// the user rather than being put on a pipe or stored in a file.
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static bool StandardErrIsDisplayed();
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/// This function determines if the given file descriptor is connected to
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/// a "tty" or "console" window. That is, the output would be displayed to
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/// the user rather than being put on a pipe or stored in a file.
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static bool FileDescriptorIsDisplayed(int fd);
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/// This function determines the number of columns in the window
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/// if standard output is connected to a "tty" or "console"
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/// window. If standard output is not connected to a tty or
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/// console, or if the number of columns cannot be determined,
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/// this routine returns zero.
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static unsigned StandardOutColumns();
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/// This function determines the number of columns in the window
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/// if standard error is connected to a "tty" or "console"
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/// window. If standard error is not connected to a tty or
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/// console, or if the number of columns cannot be determined,
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/// this routine returns zero.
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static unsigned StandardErrColumns();
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/// This function determines whether the terminal connected to standard
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/// output supports colors. If standard output is not connected to a
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/// terminal, this function returns false.
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static bool StandardOutHasColors();
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/// This function determines whether the terminal connected to standard
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/// error supports colors. If standard error is not connected to a
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/// terminal, this function returns false.
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static bool StandardErrHasColors();
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/// Whether changing colors requires the output to be flushed.
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/// This is needed on systems that don't support escape sequences for
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/// changing colors.
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static bool ColorNeedsFlush();
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/// This function returns the colorcode escape sequences.
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/// If ColorNeedsFlush() is true then this function will change the colors
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/// and return an empty escape sequence. In that case it is the
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/// responsibility of the client to flush the output stream prior to
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/// calling this function.
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static const char *OutputColor(char c, bool bold, bool bg);
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/// Same as OutputColor, but only enables the bold attribute.
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static const char *OutputBold(bool bg);
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/// Resets the terminals colors, or returns an escape sequence to do so.
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static const char *ResetColor();
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/// @}
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};
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}
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}
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#endif
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