llvm-6502/lib/Support
2012-04-03 23:36:44 +00:00
..
Unix Fix GetMainExecutable on kFreeBSD. 2012-03-26 12:05:51 +00:00
Windows Change default error_code ctor to a 'named ctor' so it's more self-documenting. 2012-02-09 19:24:12 +00:00
Allocator.cpp BumpPtrAllocator: Make sure threshold cannot be initialized with a value smaller than the slab size. 2012-03-01 22:10:16 +00:00
APFloat.cpp Replace the hashing functions on APInt and APFloat with overloads of the 2012-03-04 12:02:57 +00:00
APInt.cpp Move APInt::operator[] inline. 2012-03-14 00:38:15 +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 Add YAML parser to Support. 2012-04-03 23:09:22 +00:00
CommandLine.cpp Don't cast away constant qualifier. 2012-03-12 10:51:06 +00:00
ConstantRange.cpp Convert assert(0) to llvm_unreachable 2012-02-07 05:05:23 +00:00
COPYRIGHT.regex
CrashRecoveryContext.cpp Remove dead code. Improve llvm_unreachable text. Simplify some control flow. 2012-02-19 11:37:01 +00:00
DAGDeltaAlgorithm.cpp
DataExtractor.cpp Remove extra semi-colons. 2012-02-22 17:25:00 +00:00
DataStream.cpp Change default error_code ctor to a 'named ctor' so it's more self-documenting. 2012-02-09 19:24:12 +00:00
Debug.cpp
DeltaAlgorithm.cpp
Disassembler.cpp
Dwarf.cpp Lowercase the tag name to match the rest of dwarf. 2012-03-29 21:35:05 +00:00
DynamicLibrary.cpp
Errno.cpp
ErrorHandling.cpp
FileUtilities.cpp Change default error_code ctor to a 'named ctor' so it's more self-documenting. 2012-02-09 19:24:12 +00:00
FoldingSet.cpp Revert commit 152300 (ddunbar) since it still seems to be breaking 2012-03-08 09:32:21 +00:00
FormattedStream.cpp
GraphWriter.cpp Silence unused function warning when graphviz is not available. 2012-03-08 22:15:23 +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 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
IsInf.cpp
IsNAN.cpp
JSONParser.cpp fix typo 2012-02-06 05:29:29 +00:00
LLVMBuild.txt
LockFileManager.cpp Move Clang's file-level locking facility over to LLVM's support 2012-01-29 20:15:10 +00:00
Makefile
ManagedStatic.cpp
Memory.cpp
MemoryBuffer.cpp Add a sanity check in MemoryBuffer::getOpenFile() to make sure we don't hang 2012-03-13 20:18:42 +00:00
MemoryObject.cpp Make MemoryObject accessor members const again 2012-02-29 01:09:06 +00:00
Mutex.cpp Persuade GCC that there is nothing worth warning about here (there isn't). 2012-02-05 14:20:11 +00:00
Path.cpp
PathV2.cpp [PathV2]: Fix bug in create_directories which caused infinite recursion on 2012-03-21 23:09:14 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp
Process.cpp
Program.cpp
raw_os_ostream.cpp
raw_ostream.cpp
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 Copy the right amount of elements. 2012-03-07 22:48:42 +00:00
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
StreamableMemoryObject.cpp Make MemoryObject accessor members const again 2012-02-29 01:09:06 +00:00
StringExtras.cpp Move the implementation of StringRef::split out of StringExtras.cpp 2012-02-21 12:00:25 +00:00
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 Make StringRef::getAsInteger work with all integer types. Before this change 2012-03-10 23:02:54 +00:00
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 Add triple support for the IBM BG/P and BG/Q supercomputers. 2012-04-02 18:31:33 +00:00
Twine.cpp
Valgrind.cpp
YAMLParser.cpp Sorry about that. MSVC seems to accept just about any random string you give it ;/ 2012-04-03 23:36:44 +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