llvm-project/llvm/lib/Support
Rafael Espindola 3f6481d0d3 Remove some calls to std::move.
Instead of moving out the data in a ErrorOr<std::unique_ptr<Foo>>, get
a reference to it.

Thanks to David Blaikie for the suggestion.

llvm-svn: 214516
2014-08-01 14:31:55 +00:00
..
Unix Build fix for systems without futimes/futimens 2014-06-30 18:57:04 +00:00
Windows Windows: Don't wildcard expand /? or -? 2014-07-24 21:09:45 +00:00
APFloat.cpp APFloat: x - NaN needs to flip the signbit of NaN when x is a number. 2014-06-08 16:53:31 +00:00
APInt.cpp [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 03:07:47 +00:00
APSInt.cpp
ARMBuildAttrs.cpp ARM: update build attributes for ABI r2.09 2014-01-19 08:25:35 +00:00
ARMWinEH.cpp Support: add Windows ARM EH data structures 2014-06-02 01:17:49 +00:00
Allocator.cpp [Allocator] Hoist the external helper function into a namespace scope 2014-04-14 06:42:56 +00:00
Atomic.cpp Fix .cpp files claiming to be header files 2014-06-20 01:36:00 +00:00
BlockFrequency.cpp blockfreq: Defer to BranchProbability::scale() (again) 2014-04-29 16:31:29 +00:00
BranchProbability.cpp BranchProb: Simplify printing code 2014-04-29 17:07:42 +00:00
CMakeLists.txt Drop the udis86 wrapper from llvm::sys 2014-07-17 20:05:29 +00:00
COPYRIGHT.regex
CommandLine.cpp Remove some calls to std::move. 2014-08-01 14:31:55 +00:00
Compression.cpp Simplify compression API by compressing into a SmallVector rather than a MemoryBuffer 2014-04-05 21:53:04 +00:00
ConvertUTF.c Support/ConvertUTF: restore compatibility with MSVC, which only implements C89 2014-06-16 11:22:33 +00:00
ConvertUTFWrapper.cpp [Support] Add a Unicode conversion wrapper from UTF16 to UTF8 2013-07-16 17:14:33 +00:00
CrashRecoveryContext.cpp For CrashRecoveryContext::RunSafelyOnThread, propagate Darwin's PRIO_DARWIN_BG to the new thread if it is 2014-06-25 23:54:50 +00:00
DAGDeltaAlgorithm.cpp [Modules] Make Support/Debug.h modular. This requires it to not change 2014-04-21 22:55:11 +00:00
DataExtractor.cpp Using llvm::sys::swapByteOrder() for the common case of byte-swapping a value in place 2014-06-14 13:18:07 +00:00
DataStream.cpp Remove 'using std::errro_code' from lib. 2014-06-13 02:24:39 +00:00
Debug.cpp [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 06:32:26 +00:00
DeltaAlgorithm.cpp
Dwarf.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
DynamicLibrary.cpp Fix .cpp files claiming to be header files 2014-06-20 01:36:00 +00:00
Errno.cpp Fix some rather confusing indentation and control flow in the errno 2013-09-02 05:55:10 +00:00
ErrorHandling.cpp Merge lib/Support/WindowsError.cpp into ib/Support/ErrorHandling.cpp. 2014-06-17 18:06:45 +00:00
FileOutputBuffer.cpp Remove uses of the redundant ".reset(nullptr)" of unique_ptr, in favor of ".reset()" 2014-07-19 01:05:11 +00:00
FileUtilities.cpp Remove some calls to std::move. 2014-08-01 14:31:55 +00:00
FoldingSet.cpp [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 06:32:26 +00:00
FormattedStream.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
GraphWriter.cpp Don't use 'using std::error_code' in include/llvm. 2014-06-12 21:46:39 +00:00
Hashing.cpp
Host.cpp Add support for ppc64/power8 as a host 2014-06-26 13:37:03 +00:00
IncludeFile.cpp
IntEqClasses.cpp
IntervalMap.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
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
LLVMBuild.txt
LineIterator.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
Locale.cpp Move generic isPrint and columnWidth implementations to a separate header/source to allow using both generic and system-dependent versions on win32. 2013-09-04 16:00:12 +00:00
LockFileManager.cpp Remove some calls to std::move. 2014-08-01 14:31:55 +00:00
MD5.cpp Add support for adding the contents of a StringRef to the MD5 hash. 2013-05-31 22:34:56 +00:00
Makefile Support: Inject LLVM_VERSION_INFO into the Support library 2014-06-17 06:52:47 +00:00
ManagedStatic.cpp Fix the MinGW builder. Apparently std::call_once and 2014-06-21 00:24:51 +00:00
Memory.cpp
MemoryBuffer.cpp Update the MemoryBuffer API to use ErrorOr. 2014-07-06 17:43:13 +00:00
MemoryObject.cpp Remove the Copied parameter from MemoryObject::readBytes. 2013-05-24 10:54:58 +00:00
Mutex.cpp [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 06:32:26 +00:00
Path.cpp Don't leak a file descriptor. 2014-06-25 14:35:59 +00:00
PluginLoader.cpp
PrettyStackTrace.cpp [C++11] Replace some comparisons with 'nullptr' with simple boolean checks to reduce verbosity. 2014-04-09 04:20:00 +00:00
Process.cpp Refactor the code in clang to find a file in a PATH like environment variable into a helper function 2014-06-30 19:54:20 +00:00
Program.cpp Fix .cpp files claiming to be header files 2014-06-20 01:36:00 +00:00
README.txt.system
RWMutex.cpp [C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr. 2014-04-15 06:32:26 +00:00
RandomNumberGenerator.cpp Random Number Generator (llvm) 2014-06-25 15:21:42 +00:00
Regex.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
ScaledNumber.cpp Support: Move class ScaledNumber 2014-06-24 00:38:09 +00:00
SearchForAddressOfSpecialSymbol.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
Signals.cpp
SmallPtrSet.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
SmallVector.cpp
SourceMgr.cpp SourceMgr: consistently use 'unsigned' for the memory buffer ID type 2014-07-09 08:30:15 +00:00
SpecialCaseList.cpp Remove move assignment operator to appease older GCCs. 2014-07-10 04:39:40 +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 Recommit 211309 (StringMap::insert), reverted in 211328 due to issues with private, but non-deleted, move members. 2014-06-23 18:28:53 +00:00
StringPool.cpp Convert StringMapEntry::Create to use StringRef instead of start/end pointers. Simpliies all in tree call sites. No functional change. 2014-06-11 05:35:56 +00:00
StringRef.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
StringRefMemoryObject.cpp Remove the Copied parameter from MemoryObject::readBytes. 2013-05-24 10:54:58 +00:00
SystemUtils.cpp Move PrependMainExecutablePath next to its only user. 2013-06-14 15:12:13 +00:00
TargetRegistry.cpp Remove obsolete function TargetRegistry::getClosestTargetForJIT() 2014-07-01 10:47:13 +00:00
ThreadLocal.cpp [C++11] Make use of 'nullptr' in the Support library. 2014-04-07 04:17:22 +00:00
Threading.cpp Re-apply r211287: Remove support for LLVM runtime multi-threading. 2014-06-27 15:13:01 +00:00
TimeValue.cpp Fix 'platform-specific' hyphenations 2014-06-30 18:57:16 +00:00
Timer.cpp Kill the LLVM global lock. 2014-06-19 16:17:42 +00:00
ToolOutputFile.cpp Use the simpler version of sys::fs::remove when possible. 2014-01-10 21:40:29 +00:00
Triple.cpp Remove dead code. 2014-07-25 19:06:39 +00:00
Twine.cpp Remove unnecessary llvm:: qualification. 2014-02-26 23:27:16 +00:00
Unicode.cpp Move generic isPrint and columnWidth implementations to a separate header/source to allow using both generic and system-dependent versions on win32. 2013-09-04 16:00:12 +00:00
Valgrind.cpp Don't mark the declarations of the TSan annotation functions as weak. 2014-03-30 11:20:25 +00:00
Watchdog.cpp Add a new watchdog timer interface. The interface does not permit handling timeouts, so 2013-03-26 01:27:52 +00:00
YAMLParser.cpp [C++11] Replace some comparisons with 'nullptr' with simple boolean checks to reduce verbosity. 2014-04-09 04:20:00 +00:00
YAMLTraits.cpp Finishing touch for the std::error_code transition. 2014-06-13 17:20:48 +00:00
circular_raw_ostream.cpp
raw_os_ostream.cpp
raw_ostream.cpp Typo: exists -> exits 2014-07-17 18:33:44 +00:00
regcclass.h adding re-include guards into lib/Support/reg*.h 2014-06-12 16:07:56 +00:00
regcname.h adding re-include guards into lib/Support/reg*.h 2014-06-12 16:07:56 +00:00
regcomp.c Fix known typos 2014-01-24 17:20:08 +00:00
regengine.inc Clean up language and grammar. 2014-05-20 17:11:11 +00:00
regerror.c
regex2.h adding re-include guards into lib/Support/reg*.h 2014-06-12 16:07:56 +00:00
regex_impl.h
regexec.c
regfree.c
regstrlcpy.c
regutils.h adding re-include guards into lib/Support/reg*.h 2014-06-12 16:07:56 +00:00

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