llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-11-19 17:37:24 +00:00

History

Jeffrey Yasskin ed1c0ffe0b Add a portable strerror*() wrapper, llvm::sys::StrError(). This includes the Windows variant, strerror_s, but I couldn't test that. I'll update configure and config.h.in in a subsequent patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74621 91177308-0d34-0410-b5e6-96231b3b80d8		2009-07-01 18:11:20 +00:00
..
Unix	Add a portable strerror*() wrapper, llvm::sys::StrError(). This includes the	2009-07-01 18:11:20 +00:00
Win32
Alarm.cpp
Atomic.cpp
CMakeLists.txt
Disassembler.cpp	hasDisassembler should return false if disassembler isn't available.	2008-11-04 06:09:38 +00:00
DynamicLibrary.cpp
Errno.cpp
Host.cpp	Add llvm::sys::{osName,osVersion} for retrieving operating system name	2008-10-02 01:17:28 +00:00
IncludeFile.cpp	Specialize FORCE_DEFINING_FILE_TO_BE_LINKED using a GCC trick	2008-03-21 23:38:23 +00:00
LICENSE.TXT
Makefile	Removed trailing whitespace from Makefiles.	2009-01-09 16:44:42 +00:00
Memory.cpp	ARM / Mac OS X also wants to invalidate icache after jitting.	2008-11-14 02:33:17 +00:00
Mutex.cpp
Path.cpp
Process.cpp
Program.cpp
README.txt
RWMutex.cpp
Signals.cpp
Threading.cpp
ThreadLocal.cpp
TimeValue.cpp

README.txt

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</a></li>
 5. Multiple Implementations</a></li>
 6. Minimize Memory Allocation</a></li>
 7. No Virtual Methods