llvm-svn: 74248

llvm-svn: 74226

Windows people, please double-check/patch this.

llvm-svn: 74209

Insert a SmartMutex templated class into the class hierarchy, which takes a template parameter specifying whether this mutex
should become a no-op when not running in multithreaded mode.  Make sys::Mutex a typedef of SmartMutex<false>, to preserve source compatibility.

llvm-svn: 73709

llvm-svn: 73552

llvm-svn: 73545

llvm-svn: 45418

llvm-svn: 22422

llvm-svn: 22420

Add a Mutex class for thread synchronization in a platform-independent way.
The current implementation only supports pthreads. Win32 use of Critical
Sections will be added later. The design permits other threading models to
be used if (and only if) pthreads is not available.

llvm-svn: 22403

llvm-svn: 21704

llvm-svn: 21422

llvm-svn: 16288

"Program" operating system concept (find and execute programs).

llvm-svn: 16084

note individually but these essence of it is to not derive from
std::string, clarify the interface, and provide better documentation.
There is now also (untested) implementations for AIX, Darwin, and SunOS.

llvm-svn: 16078

llvm-svn: 16048