llvm-6502/lib/Support
Rafael Espindola 8acff70de1 Cleanup the interface for creating soft or hard links.
Before this patch the unix code for creating hardlinks was unused. The code
for creating symbolic links was implemented in lib/Support/LockFileManager.cpp
and the code for creating hard links in lib/Support/*/Path.inc.

The only use we have for these is in LockFileManager.cpp and it can use both
soft and hard links. Just have a create_link function that creates one or the
other depending on the platform.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203596 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-11 18:40:24 +00:00
..
Unix Cleanup the interface for creating soft or hard links. 2014-03-11 18:40:24 +00:00
Windows Cleanup the interface for creating soft or hard links. 2014-03-11 18:40:24 +00:00
Allocator.cpp
APFloat.cpp APFloat: Add a move ctor and operator= 2014-03-04 20:26:51 +00:00
APInt.cpp
APSInt.cpp
ARMBuildAttrs.cpp
Atomic.cpp
BlockFrequency.cpp
BranchProbability.cpp
circular_raw_ostream.cpp
CMakeLists.txt [Modules] Move the ConstantRange class into the IR library. This is 2014-03-04 12:24:34 +00:00
CommandLine.cpp Replace OwningPtr<T> with std::unique_ptr<T>. 2014-03-06 05:51:42 +00:00
Compression.cpp Replace OwningPtr<T> with std::unique_ptr<T>. 2014-03-06 05:51:42 +00:00
ConvertUTF.c
ConvertUTFWrapper.cpp
COPYRIGHT.regex
CrashRecoveryContext.cpp Remove dependence on std::function. 2014-03-04 22:13:07 +00:00
DAGDeltaAlgorithm.cpp [C++11] Remove 'virtual' keyword from methods marked with 'override' keyword. 2014-03-10 03:53:12 +00:00
DataExtractor.cpp
DataStream.cpp [C++11] Remove 'virtual' keyword from methods marked with 'override' keyword. 2014-03-10 03:53:12 +00:00
Debug.cpp
DeltaAlgorithm.cpp
Disassembler.cpp
Dwarf.cpp
DynamicLibrary.cpp
Errno.cpp
ErrorHandling.cpp Roll back the ConstStringRef change for now 2014-01-27 05:24:39 +00:00
FileOutputBuffer.cpp [C++11] Add overloads for externally used OwningPtr functions. 2014-03-05 10:27:34 +00:00
FileUtilities.cpp Replace OwningPtr<T> with std::unique_ptr<T>. 2014-03-06 05:51:42 +00:00
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 Cleanup the interface for creating soft or hard links. 2014-03-11 18:40:24 +00:00
Makefile
ManagedStatic.cpp Revert "[C++11] Replace LLVM atomics with std::atomic." 2014-03-03 18:02:34 +00:00
MD5.cpp
Memory.cpp
MemoryBuffer.cpp [C++11] Remove 'virtual' keyword from methods marked with 'override' keyword. 2014-03-10 03:53:12 +00:00
MemoryObject.cpp
Mutex.cpp Remove unnecessary call to pthread_mutexattr_setpshared() 2014-01-29 00:20:44 +00:00
Path.cpp Fix an inconsistency in treatment of trailing / in path::const_iterator 2014-03-05 19:56:30 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp
Process.cpp Hopefully fixing the MinGW 32 build, which was broken by r200767. Not using rand_s() since MinGW does not have an implementation for it, but instead using the underlying CryptGenRandom APIs. 2014-02-11 02:47:33 +00:00
Program.cpp
raw_os_ostream.cpp
raw_ostream.cpp Revert "Use StringRef in raw_fd_ostream constructor" 2014-02-27 02:09:10 +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 [C++11] Remove the R-value reference #if usage from the ADT and Support 2014-03-01 09:27:28 +00:00
SmallVector.cpp
SourceMgr.cpp Replace OwningPtr<T> with std::unique_ptr<T>. 2014-03-06 05:51:42 +00:00
Statistic.cpp Revert "[C++11] Replace LLVM atomics with std::atomic." 2014-03-03 18:02:34 +00:00
StreamableMemoryObject.cpp [C++11] Remove 'virtual' keyword from methods marked with 'override' keyword. 2014-03-10 03:53:12 +00:00
StringExtras.cpp
StringMap.cpp
StringPool.cpp
StringRef.cpp Replace OwningPtr<T> with std::unique_ptr<T>. 2014-03-06 05:51:42 +00:00
StringRefMemoryObject.cpp
system_error.cpp [C++11] Remove 'virtual' keyword from methods marked with 'override' keyword. 2014-03-10 03:53:12 +00:00
SystemUtils.cpp
TargetRegistry.cpp [C++11] Revert uses of lambdas with array_pod_sort. 2014-03-07 21:52:38 +00:00
Threading.cpp Revert "[C++11] Replace LLVM atomics with std::atomic." 2014-03-03 18:02:34 +00:00
ThreadLocal.cpp [C++11] Replace LLVM_STATIC_ASSERT with static_assert, we now have 2014-03-02 13:10:45 +00:00
Timer.cpp Replace OwningPtr<T> with std::unique_ptr<T>. 2014-03-06 05:51:42 +00:00
TimeValue.cpp
ToolOutputFile.cpp
Triple.cpp Fix inconsistent whitespace. 2014-03-09 23:17:28 +00:00
Twine.cpp Remove unnecessary llvm:: qualification. 2014-02-26 23:27:16 +00:00
Unicode.cpp
Valgrind.cpp
Watchdog.cpp
YAMLParser.cpp Replace OwningPtr<T> with std::unique_ptr<T>. 2014-03-06 05:51:42 +00:00
YAMLTraits.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