llvm/lib/Support
JF Bastien 02b4e6e7ab Revert "Random Number Generator (llvm)"
This reverts commit cccba093090d127e0b6d17473b14c264c14c5259.

It causes build breakage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211146 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-18 06:33:23 +00:00
..
Unix Finishing touch for the std::error_code transition. 2014-06-13 17:20:48 +00:00
Windows Finishing touch for the std::error_code transition. 2014-06-13 17:20:48 +00:00
Allocator.cpp [Allocator] Hoist the external helper function into a namespace scope 2014-04-14 06:42:56 +00:00
APFloat.cpp APFloat: x - NaN needs to flip the signbit of NaN when x is a number. 2014-06-08 16:53:31 +00:00
APInt.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 03:07:47 +00:00
APSInt.cpp
ARMBuildAttrs.cpp ARM: update build attributes for ABI r2.09 2014-01-19 08:25:35 +00:00
ARMWinEH.cpp Support: add Windows ARM EH data structures 2014-06-02 01:17:49 +00:00
Atomic.cpp Include intrin.h before windows.h as a workaround for the x64 self-host 2014-05-06 00:57:33 +00:00
BlockFrequency.cpp blockfreq: Defer to BranchProbability::scale() (again) 2014-04-29 16:31:29 +00:00
BranchProbability.cpp BranchProb: Simplify printing code 2014-04-29 17:07:42 +00:00
circular_raw_ostream.cpp
CMakeLists.txt Revert "Random Number Generator (llvm)" 2014-06-18 06:33:23 +00:00
CommandLine.cpp tools: Add a space between package version and LLVM_VERSION_INFO 2014-06-17 06:52:41 +00:00
Compression.cpp Simplify compression API by compressing into a SmallVector rather than a MemoryBuffer 2014-04-05 21:53:04 +00:00
ConvertUTF.c Support/ConvertUTF: restore compatibility with MSVC, which only implements C89 2014-06-16 11:22:33 +00:00
ConvertUTFWrapper.cpp [Support] Add a Unicode conversion wrapper from UTF16 to UTF8 2013-07-16 17:14:33 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp Test commit, wraps some lines to fit in 80 columns. 2014-06-10 18:03:04 +00:00
DAGDeltaAlgorithm.cpp [Modules] Make Support/Debug.h modular. This requires it to not change 2014-04-21 22:55:11 +00:00
DataExtractor.cpp Using llvm::sys::swapByteOrder() for the common case of byte-swapping a value in place 2014-06-14 13:18:07 +00:00
DataStream.cpp Remove 'using std::errro_code' from lib. 2014-06-13 02:24:39 +00:00
Debug.cpp [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 06:32:26 +00:00
DeltaAlgorithm.cpp Revert r171829 "Split changeset_ty using iterators instead of loops" as it breaks the VS2008 build 2013-01-14 14:13:06 +00:00
Disassembler.cpp Remove some std stream usage from Support and TableGen 2013-08-06 22:51:21 +00:00
Dwarf.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
DynamicLibrary.cpp [C++11] Replace some comparisons with 'nullptr' with simple boolean checks to reduce verbosity. 2014-04-09 04:20:00 +00:00
Errno.cpp Fix some rather confusing indentation and control flow in the errno 2013-09-02 05:55:10 +00:00
ErrorHandling.cpp Merge lib/Support/WindowsError.cpp into ib/Support/ErrorHandling.cpp. 2014-06-17 18:06:45 +00:00
FileOutputBuffer.cpp Finishing touch for the std::error_code transition. 2014-06-13 17:20:48 +00:00
FileUtilities.cpp Remove 'using std::errro_code' from lib. 2014-06-13 02:24:39 +00:00
FoldingSet.cpp [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 06:32:26 +00:00
FormattedStream.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
GraphWriter.cpp Don't use 'using std::error_code' in include/llvm. 2014-06-12 21:46:39 +00:00
Hashing.cpp Add the source file with trivial definitions in it that was missing from 2012-03-01 18:58:59 +00:00
Host.cpp Fix typos 2014-05-31 21:26:28 +00:00
IncludeFile.cpp Clean up a few references to System/. We still have docs/SystemLibrary.html 2011-10-11 20:02:52 +00:00
IntEqClasses.cpp Use IntEqClasses to compute connected components of live intervals. 2010-12-21 00:48:17 +00:00
IntervalMap.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
IntrusiveRefCntPtr.cpp Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch 2011-12-20 02:50:00 +00:00
IsInf.cpp
IsNAN.cpp
LEB128.cpp Don't inline get[S|U]LEB128Size() until they are proved to be hot. 2014-02-22 15:39:39 +00:00
LineIterator.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
LLVMBuild.txt LLVMBuild: Remove trailing newline, which irked me. 2011-12-12 19:48:00 +00:00
Locale.cpp Move generic isPrint and columnWidth implementations to a separate header/source to allow using both generic and system-dependent versions on win32. 2013-09-04 16:00:12 +00:00
LockFileManager.cpp Finishing touch for the std::error_code transition. 2014-06-13 17:20:48 +00:00
Makefile Support: Inject LLVM_VERSION_INFO into the Support library 2014-06-17 06:52:47 +00:00
ManagedStatic.cpp Revert r211066, 211067, 211068, 211069, 211070. 2014-06-16 22:49:41 +00:00
MD5.cpp Add support for adding the contents of a StringRef to the MD5 hash. 2013-05-31 22:34:56 +00:00
Memory.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
MemoryBuffer.cpp Finishing touch for the std::error_code transition. 2014-06-13 17:20:48 +00:00
MemoryObject.cpp Remove the Copied parameter from MemoryObject::readBytes. 2013-05-24 10:54:58 +00:00
Mutex.cpp [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 06:32:26 +00:00
Path.cpp Finishing touch for the std::error_code transition. 2014-06-13 17:20:48 +00:00
PluginLoader.cpp Use the new script to sort the includes of every file under lib. 2012-12-03 16:50:05 +00:00
PrettyStackTrace.cpp [C++11] Replace some comparisons with 'nullptr' with simple boolean checks to reduce verbosity. 2014-04-09 04:20:00 +00:00
Process.cpp Disable Visual C++ warning 4722 about aborting a destructor, 2014-03-25 08:42:49 +00:00
Program.cpp Remove system_error.h. 2014-06-12 17:38:55 +00:00
raw_os_ostream.cpp
raw_ostream.cpp Don't use 'using std::error_code' in include/llvm. 2014-06-12 21:46:39 +00:00
README.txt.system Merge System into Support. 2010-11-29 18:16:10 +00:00
regcclass.h adding re-include guards into lib/Support/reg*.h 2014-06-12 16:07:56 +00:00
regcname.h adding re-include guards into lib/Support/reg*.h 2014-06-12 16:07:56 +00:00
regcomp.c Fix known typos 2014-01-24 17:20:08 +00:00
regengine.inc Clean up language and grammar. 2014-05-20 17:11:11 +00:00
regerror.c
regex2.h adding re-include guards into lib/Support/reg*.h 2014-06-12 16:07:56 +00:00
regex_impl.h
Regex.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
regexec.c Fix integer undefined behavior due to signed left shift overflow in LLVM. 2012-08-24 23:29:28 +00:00
regfree.c
regstrlcpy.c
regutils.h adding re-include guards into lib/Support/reg*.h 2014-06-12 16:07:56 +00:00
RWMutex.cpp [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 06:32:26 +00:00
SearchForAddressOfSpecialSymbol.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
Signals.cpp Fix a ton of comment typos found by codespell. Patch by 2011-04-15 05:18:47 +00:00
SmallPtrSet.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
SmallVector.cpp Reduce alignment of SmallVector<T> to the required amount, rather than forcing 16-byte alignment. This fixes misaligned SmallVector accesses via ExtractValueInst's SmallVector data member. 2012-08-22 00:11:07 +00:00
SourceMgr.cpp Add an overload for SourceMgr::PrintMessage that takes an existing diagnostic. 2014-06-17 02:15:40 +00:00
Statistic.cpp Revert "[C++11] Replace LLVM atomics with std::atomic." 2014-03-03 18:02:34 +00:00
StreamableMemoryObject.cpp [C++11] Remove 'virtual' keyword from methods marked with 'override' keyword. 2014-03-10 03:53:12 +00:00
StringExtras.cpp Move the implementation of StringRef::split out of StringExtras.cpp 2012-02-21 12:00:25 +00:00
StringMap.cpp [C++11] Replace some comparisons with 'nullptr' with simple boolean checks to reduce verbosity. 2014-04-09 04:20:00 +00:00
StringPool.cpp Convert StringMapEntry::Create to use StringRef instead of start/end pointers. Simpliies all in tree call sites. No functional change. 2014-06-11 05:35:56 +00:00
StringRef.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
StringRefMemoryObject.cpp Remove the Copied parameter from MemoryObject::readBytes. 2013-05-24 10:54:58 +00:00
SystemUtils.cpp Move PrependMainExecutablePath next to its only user. 2013-06-14 15:12:13 +00:00
TargetRegistry.cpp [C++11] Replace some comparisons with 'nullptr' with simple boolean checks to reduce verbosity. 2014-04-09 04:20:00 +00:00
Threading.cpp Revert r211066, 211067, 211068, 211069, 211070. 2014-06-16 22:49:41 +00:00
ThreadLocal.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
Timer.cpp Revert r211066, 211067, 211068, 211069, 211070. 2014-06-16 22:49:41 +00:00
TimeValue.cpp Fix initialization-order bug in llvm::Support::TimeValue. TimeValue::now() is explicitly called during module initialization of lib/Support/Process.cpp. It reads the field of global object PosixZeroTime, which is not guaranteed to be initialized at this point. Found by AddressSanitizer with -fsanitize=init-order option. 2013-02-19 11:35:39 +00:00
ToolOutputFile.cpp Use the simpler version of sys::fs::remove when possible. 2014-01-10 21:40:29 +00:00
Triple.cpp [ARM64] Add big endian target arm64_be. 2014-04-14 17:37:53 +00:00
Twine.cpp Remove unnecessary llvm:: qualification. 2014-02-26 23:27:16 +00:00
Unicode.cpp Move generic isPrint and columnWidth implementations to a separate header/source to allow using both generic and system-dependent versions on win32. 2013-09-04 16:00:12 +00:00
Valgrind.cpp Don't mark the declarations of the TSan annotation functions as weak. 2014-03-30 11:20:25 +00:00
Watchdog.cpp Add a new watchdog timer interface. The interface does not permit handling timeouts, so 2013-03-26 01:27:52 +00:00
YAMLParser.cpp [C++11] Replace some comparisons with 'nullptr' with simple boolean checks to reduce verbosity. 2014-04-09 04:20:00 +00:00
YAMLTraits.cpp Finishing touch for the std::error_code transition. 2014-06-13 17:20:48 +00:00

Design Of lib/System
====================

The software in this directory is designed to completely shield LLVM from any
and all operating system specific functionality. It is not intended to be a
complete operating system wrapper (such as ACE), but only to provide the
functionality necessary to support LLVM.

The software located here, of necessity, has very specific and stringent design
rules. Violation of these rules means that cracks in the shield could form and
the primary goal of the library is defeated. By consistently using this library,
LLVM becomes more easily ported to new platforms since the only thing requiring
porting is this library.

Complete documentation for the library can be found in the file:
  llvm/docs/SystemLibrary.html
or at this URL:
  http://llvm.org/docs/SystemLibrary.html

While we recommend that you read the more detailed documentation, for the
impatient, here's a high level summary of the library's requirements.

 1. No system header files are to be exposed through the interface.
 2. Std C++ and Std C header files are okay to be exposed through the interface.
 3. No exposed system-specific functions.
 4. No exposed system-specific data.
 5. Data in lib/System classes must use only simple C++ intrinsic types.
 6. Errors are handled by returning "true" and setting an optional std::string
 7. Library must not throw any exceptions, period.
 8. Interface functions must not have throw() specifications.
 9. No duplicate function impementations are permitted within an operating
    system class.

To accomplish these requirements, the library has numerous design criteria that
must be satisfied. Here's a high level summary of the library's design criteria:

 1. No unused functionality (only what LLVM needs)
 2. High-Level Interfaces
 3. Use Opaque Classes
 4. Common Implementations
 5. Multiple Implementations
 6. Minimize Memory Allocation
 7. No Virtual Methods