llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-28 19:31:58 +00:00

History

Rafael Espindola 589d637725 Simplify remove, create_directory and create_directories. Before this patch they would take an boolean argument to say if the path already existed. This was redundant with the returned error_code which is able to represent that. This allowed for callers to incorrectly check only the existed flag instead of first checking the error code. Instead, pass in a boolean flag to say if the previous (non-)existence should be an error or not. Callers of the of the old simple versions are not affected. They still ignore the previous (non-)existence as they did before. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201979 91177308-0d34-0410-b5e6-96231b3b80d8		2014-02-23 13:56:14 +00:00
..
Unix	Simplify remove, create_directory and create_directories.	2014-02-23 13:56:14 +00:00
Windows	Simplify remove, create_directory and create_directories.	2014-02-23 13:56:14 +00:00
Allocator.cpp	[BumpPtrAllocator] Move DefaultSlabAllocator to a member of BumpPtrAllocator, instead of a static variable.	2013-08-28 01:02:21 +00:00
APFloat.cpp
APInt.cpp
APSInt.cpp
ARMBuildAttrs.cpp
Atomic.cpp
BlockFrequency.cpp
BranchProbability.cpp
circular_raw_ostream.cpp
CMakeLists.txt	Simplify linking to system libraries	2014-02-23 06:27:04 +00:00
CommandLine.cpp
Compression.cpp
ConstantRange.cpp
ConvertUTF.c
ConvertUTFWrapper.cpp
COPYRIGHT.regex
CrashRecoveryContext.cpp	Rename Windows.h to WindowsSupport.h to avoid ambiguity	2014-02-12 21:26:20 +00:00
DAGDeltaAlgorithm.cpp
DataExtractor.cpp
DataStream.cpp
Debug.cpp
DeltaAlgorithm.cpp
Disassembler.cpp
Dwarf.cpp
DynamicLibrary.cpp
Errno.cpp
ErrorHandling.cpp
FileOutputBuffer.cpp
FileUtilities.cpp
FoldingSet.cpp
FormattedStream.cpp
GraphWriter.cpp
Hashing.cpp
Host.cpp
IncludeFile.cpp
IntEqClasses.cpp
IntervalMap.cpp
IntrusiveRefCntPtr.cpp
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
LLVMBuild.txt
Locale.cpp
LockFileManager.cpp	Use simpler version of sys::fs::exists when possible.	2014-02-13 04:00:35 +00:00
Makefile
ManagedStatic.cpp
MD5.cpp
Memory.cpp
MemoryBuffer.cpp
MemoryObject.cpp
Mutex.cpp
Path.cpp	Simplify remove, create_directory and create_directories.	2014-02-23 13:56:14 +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
SearchForAddressOfSpecialSymbol.cpp
Signals.cpp
SmallPtrSet.cpp
SmallVector.cpp
SourceMgr.cpp
Statistic.cpp
StreamableMemoryObject.cpp
StringExtras.cpp
StringMap.cpp
StringPool.cpp
StringRef.cpp
StringRefMemoryObject.cpp
system_error.cpp
SystemUtils.cpp
TargetRegistry.cpp
Threading.cpp	Rename Windows.h to WindowsSupport.h to avoid ambiguity	2014-02-12 21:26:20 +00:00
ThreadLocal.cpp
Timer.cpp
TimeValue.cpp
ToolOutputFile.cpp
Triple.cpp
Twine.cpp
Unicode.cpp
Valgrind.cpp
Watchdog.cpp
YAMLParser.cpp
YAMLTraits.cpp

README.txt.system

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