llvm-6502/lib/Support
Saleem Abdulrasool f96cd1aeb5 ADT: remove MinGW32 and Cygwin OSType enum
Remove the MinGW32 and Cygwin types from the OSType enumeration.  These values
are represented via environments of Windows.  It is a source of confusion and
needlessly clutters the code.  The cost of doing this is that we must sink the
check for them into the normalization code path along with the spelling.

Addresses PR20592.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215303 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-09 23:12:20 +00:00
..
Unix Remove dead code. Fixes pr20544. 2014-08-08 21:35:52 +00:00
Windows Remove dead code. Fixes pr20544. 2014-08-08 21:35:52 +00:00
Allocator.cpp
APFloat.cpp
APInt.cpp
APSInt.cpp
ARMBuildAttrs.cpp
ARMWinEH.cpp
Atomic.cpp Fix .cpp files claiming to be header files 2014-06-20 01:36:00 +00:00
BlockFrequency.cpp
BranchProbability.cpp
circular_raw_ostream.cpp
CMakeLists.txt Remove Support/IncludeFile.h and its only user. This is actively harmful, since 2014-08-07 20:41:17 +00:00
CommandLine.cpp Remove some calls to std::move. 2014-08-01 14:31:55 +00:00
Compression.cpp
ConvertUTF.c Support/ConvertUTF: restore compatibility with MSVC, which only implements C89 2014-06-16 11:22:33 +00:00
ConvertUTFWrapper.cpp
COPYRIGHT.regex
CrashRecoveryContext.cpp For CrashRecoveryContext::RunSafelyOnThread, propagate Darwin's PRIO_DARWIN_BG to the new thread if it is 2014-06-25 23:54:50 +00:00
DAGDeltaAlgorithm.cpp
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
Debug.cpp
DeltaAlgorithm.cpp
Dwarf.cpp
DynamicLibrary.cpp Fix .cpp files claiming to be header files 2014-06-20 01:36:00 +00:00
Errno.cpp
ErrorHandling.cpp Merge lib/Support/WindowsError.cpp into ib/Support/ErrorHandling.cpp. 2014-06-17 18:06:45 +00:00
FileOutputBuffer.cpp Remove uses of the redundant ".reset(nullptr)" of unique_ptr, in favor of ".reset()" 2014-07-19 01:05:11 +00:00
FileUtilities.cpp Remove some calls to std::move. 2014-08-01 14:31:55 +00:00
FoldingSet.cpp
FormattedStream.cpp
GraphWriter.cpp
Hashing.cpp
Host.cpp Add support for ppc64/power8 as a host 2014-06-26 13:37:03 +00:00
IntEqClasses.cpp
IntervalMap.cpp
IntrusiveRefCntPtr.cpp
IsInf.cpp
IsNAN.cpp
LEB128.cpp
LineIterator.cpp
LLVMBuild.txt
Locale.cpp
LockFileManager.cpp Remove some calls to std::move. 2014-08-01 14:31:55 +00:00
Makefile Support: Inject LLVM_VERSION_INFO into the Support library 2014-06-17 06:52:47 +00:00
ManagedStatic.cpp Fix the MinGW builder. Apparently std::call_once and 2014-06-21 00:24:51 +00:00
MD5.cpp
Memory.cpp
MemoryBuffer.cpp Fix typo. 2014-08-09 00:26:27 +00:00
MemoryObject.cpp
Mutex.cpp
Path.cpp Fix the windows build. 2014-08-08 22:09:31 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp
Process.cpp Refactor the code in clang to find a file in a PATH like environment variable into a helper function 2014-06-30 19:54:20 +00:00
Program.cpp Fix .cpp files claiming to be header files 2014-06-20 01:36:00 +00:00
RandomNumberGenerator.cpp Random Number Generator (llvm) 2014-06-25 15:21:42 +00:00
raw_os_ostream.cpp
raw_ostream.cpp Typo: exists -> exits 2014-07-17 18:33:44 +00:00
README.txt.system
regcclass.h
regcname.h
regcomp.c
regengine.inc
regerror.c
regex2.h
regex_impl.h
Regex.cpp
regexec.c
regfree.c
regstrlcpy.c
regutils.h
RWMutex.cpp
ScaledNumber.cpp Support: Move class ScaledNumber 2014-06-24 00:38:09 +00:00
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp
SmallVector.cpp
SourceMgr.cpp SourceMgr: consistently use 'unsigned' for the memory buffer ID type 2014-07-09 08:30:15 +00:00
SpecialCaseList.cpp Remove move assignment operator to appease older GCCs. 2014-07-10 04:39:40 +00:00
Statistic.cpp
StreamableMemoryObject.cpp
StringExtras.cpp
StringMap.cpp Recommit 211309 (StringMap::insert), reverted in 211328 due to issues with private, but non-deleted, move members. 2014-06-23 18:28:53 +00:00
StringPool.cpp
StringRef.cpp
StringRefMemoryObject.cpp
SystemUtils.cpp
TargetRegistry.cpp Remove obsolete function TargetRegistry::getClosestTargetForJIT() 2014-07-01 10:47:13 +00:00
Threading.cpp Re-apply r211287: Remove support for LLVM runtime multi-threading. 2014-06-27 15:13:01 +00:00
ThreadLocal.cpp
Timer.cpp Kill the LLVM global lock. 2014-06-19 16:17:42 +00:00
TimeValue.cpp Fix 'platform-specific' hyphenations 2014-06-30 18:57:16 +00:00
ToolOutputFile.cpp
Triple.cpp ADT: remove MinGW32 and Cygwin OSType enum 2014-08-09 23:12:20 +00:00
Twine.cpp
Unicode.cpp
Valgrind.cpp
Watchdog.cpp
YAMLParser.cpp
YAMLTraits.cpp Fix bug 20125 - clang-format segfaults on bad config. 2014-08-08 13:58:00 +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