llvm-6502/lib/Support
2012-01-20 21:51:11 +00:00
..
Unix Remove SetWorkingDirectory from the Process interface. Nothing in LLVM 2012-01-15 08:41:35 +00:00
Windows Remove SetWorkingDirectory from the Process interface. Nothing in LLVM 2012-01-15 08:41:35 +00:00
Allocator.cpp
APFloat.cpp Add 'llvm_unreachable' to passify GCC's understanding of the constraints 2012-01-10 18:08:01 +00:00
APInt.cpp Fix APInt::rotl and APInt::rotr so that they work correctly. Found while writing some code that tried to use them. 2011-12-22 03:15:35 +00:00
APSInt.cpp
Atomic.cpp drop unneeded config.h includes 2011-12-22 23:04:07 +00:00
BlockFrequency.cpp
BranchProbability.cpp
circular_raw_ostream.cpp
CMakeLists.txt Fix up the CMake build for the new files added in r146960, they're 2011-12-20 08:42:11 +00:00
CommandLine.cpp Removing unused default switch cases in switches over enums that already account for all enumeration values explicitly. 2012-01-16 23:24:27 +00:00
ConstantRange.cpp Conform to the style guide; remove 'else' after 'return'. Also remove an extra 2012-01-03 20:33:00 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp
DAGDeltaAlgorithm.cpp
DataExtractor.cpp
Debug.cpp
DeltaAlgorithm.cpp
Disassembler.cpp
Dwarf.cpp
DynamicLibrary.cpp
Errno.cpp
ErrorHandling.cpp
FileUtilities.cpp
FoldingSet.cpp
FormattedStream.cpp
GraphWriter.cpp
Host.cpp Remove unreachable code. (replace with llvm_unreachable to help GCC where necessary) 2012-01-17 04:43:56 +00:00
IncludeFile.cpp
IntEqClasses.cpp
IntervalMap.cpp
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
JSONParser.cpp Removes template magic to build up containers. 2012-01-17 09:34:07 +00:00
LLVMBuild.txt LLVMBuild: Remove trailing newline, which irked me. 2011-12-12 19:48:00 +00:00
Makefile
ManagedStatic.cpp
Memory.cpp
MemoryBuffer.cpp
MemoryObject.cpp
Mutex.cpp Remove dead code. 2012-01-15 01:09:13 +00:00
Path.cpp Support/FileSystem: Add file_magic and move a vew clients over to it. 2011-12-13 23:17:12 +00:00
PathV2.cpp Support/FileSystem: Add file_magic and move a vew clients over to it. 2011-12-13 23:17:12 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp
Process.cpp
Program.cpp Support/Program: Make Change<stream>ToBinary return error_code. 2011-12-13 23:16:49 +00:00
raw_os_ostream.cpp
raw_ostream.cpp Support/Program: Make Change<stream>ToBinary return error_code. 2011-12-13 23:16:49 +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 Remove dead code. 2012-01-15 01:09:13 +00:00
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp
SmallVector.cpp
SourceMgr.cpp Removing unused default switch cases in switches over enums that already account for all enumeration values explicitly. 2012-01-16 23:24:27 +00:00
Statistic.cpp
StringExtras.cpp
StringMap.cpp Switch StringMap from an array of structures to a structure of arrays. 2011-12-27 20:35:07 +00:00
StringPool.cpp
StringRef.cpp
system_error.cpp
SystemUtils.cpp
TargetRegistry.cpp revert r147542 after comments from Joerg Sonnenberger 2012-01-05 18:28:46 +00:00
Threading.cpp
ThreadLocal.cpp
Timer.cpp
TimeValue.cpp
ToolOutputFile.cpp
Triple.cpp More dead code removal (using -Wunreachable-code) 2012-01-20 21:51:11 +00:00
Twine.cpp
Valgrind.cpp

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