llvm-6502/lib/Support
Manman Ren 6afede522e Revert r185852.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185861 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-08 20:27:34 +00:00
..
Unix We now always create files with the correct permissions. Simplify the interface. 2013-07-08 16:42:01 +00:00
Windows We now always create files with the correct permissions. Simplify the interface. 2013-07-08 16:42:01 +00:00
Allocator.cpp
APFloat.cpp [APFloat] Swap an early out check so we do not dereference str.end(). 2013-07-02 15:50:05 +00:00
APInt.cpp APInt: Simplify code. No functionality change. 2013-06-01 11:26:39 +00:00
APSInt.cpp
Atomic.cpp
BlockFrequency.cpp Fix a bad overflow check pointed out by Ben. 2013-06-28 21:51:18 +00:00
BranchProbability.cpp
circular_raw_ostream.cpp
CMakeLists.txt Rename PathV2 to just Path now that it is the only one. 2013-06-26 19:33:03 +00:00
CommandLine.cpp Don't use PathV1 in CommandLine.cpp. 2013-06-12 15:37:27 +00:00
Compression.cpp Fixup for r180094: properly use MSan interface functions 2013-04-23 13:35:32 +00:00
ConstantRange.cpp
ConvertUTF.c
ConvertUTFWrapper.cpp
COPYRIGHT.regex
CrashRecoveryContext.cpp [Support/CrashRecoveryContext] Make sure CrashRecoveryContext does not clear the thread-local "CurrentContext" 2013-06-19 22:53:45 +00:00
DAGDeltaAlgorithm.cpp
DataExtractor.cpp
DataStream.cpp Remove the program class. 2013-06-12 20:58:35 +00:00
Debug.cpp
DeltaAlgorithm.cpp
Disassembler.cpp
Dwarf.cpp
DynamicLibrary.cpp
Errno.cpp
ErrorHandling.cpp
FileOutputBuffer.cpp Create files with the correct permission instead of changing it afterwards. 2013-07-08 15:22:09 +00:00
FileUtilities.cpp Remove a use of PathV1.h. 2013-06-14 15:24:56 +00:00
FoldingSet.cpp
FormattedStream.cpp Add line tracking support to FormattedStream 2013-05-08 20:29:10 +00:00
GraphWriter.cpp Find xdot or xdot.py. 2013-07-08 20:24:54 +00:00
Hashing.cpp
Host.cpp Make host ARM CPU feature detection independent of the vendor 2013-06-11 21:45:01 +00:00
IncludeFile.cpp
IntEqClasses.cpp
IntervalMap.cpp
IntrusiveRefCntPtr.cpp
IsInf.cpp
IsNAN.cpp
LLVMBuild.txt
Locale.cpp
LocaleGeneric.inc
LocaleWindows.inc
LocaleXlocale.inc
LockFileManager.cpp Add a createUniqueFile function and switch llvm's users of unique_file. 2013-07-05 21:01:08 +00:00
Makefile
ManagedStatic.cpp
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
MemoryBuffer.cpp keep only the StringRef version of getFileOrSTDIN. 2013-06-25 05:28:34 +00:00
MemoryObject.cpp Remove the Copied parameter from MemoryObject::readBytes. 2013-05-24 10:54:58 +00:00
Mutex.cpp
Path.cpp Remove unique_file now that it is unused. 2013-07-05 21:19:35 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp
Process.cpp
Program.cpp Replace use of PathV1.h in Program.cpp. 2013-06-14 19:38:45 +00:00
raw_os_ostream.cpp
raw_ostream.cpp Remove the program class. 2013-06-12 20:58:35 +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
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp
SmallVector.cpp
SourceMgr.cpp Use only explicit bool conversion operators 2013-05-15 07:36:59 +00:00
Statistic.cpp
StreamableMemoryObject.cpp Remove the Copied parameter from MemoryObject::readBytes. 2013-05-24 10:54:58 +00:00
StringExtras.cpp
StringMap.cpp
StringPool.cpp
StringRef.cpp Revert r185852. 2013-07-08 20:27:34 +00:00
StringRefMemoryObject.cpp Remove the Copied parameter from MemoryObject::readBytes. 2013-05-24 10:54:58 +00:00
system_error.cpp
SystemUtils.cpp Move PrependMainExecutablePath next to its only user. 2013-06-14 15:12:13 +00:00
TargetRegistry.cpp
Threading.cpp
ThreadLocal.cpp
Timer.cpp
TimeValue.cpp
ToolOutputFile.cpp Reapply r183985 now that the missing check was added to PathV2. 2013-06-17 20:37:56 +00:00
Triple.cpp [NVPTX] Add support for selecting CUDA vs OCL mode based on triple 2013-06-21 18:51:49 +00:00
Twine.cpp
Valgrind.cpp
Watchdog.cpp
YAMLParser.cpp Add ArrayRef constructor from None, and do the cleanups that this constructor enables 2013-05-05 00:40:33 +00:00
YAMLTraits.cpp Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size. 2013-07-04 01:31:24 +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