6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-26 09:18:56 +00:00
Code Issues Projects Releases Wiki Activity

For PR616:

Browse Source 
These patches make threading optional in LLVM. The configuration scripts are now
modified to accept a --disable-threads switch. If this is used, the Mutex class
will be implemented with all functions as no-op. Furthermore, linking against
libpthread will not be done. Finally, the ParallelJIT example needs libpthread
so its makefile was changed to always add -lpthread to the link line.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23003 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2005-08-24 10:07:20 +00:00
parent 6ef4949a0b
commit 0a262ba7c3
6 changed files with 259 additions and 194 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
lib/System/Mutex.cpp
View File

@@ -11,23 +11,36 @@
//
//===----------------------------------------------------------------------===//
#include "llvm/System/Mutex.h"
#include "llvm/Config/config.h"
#include "llvm/System/Mutex.h"
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only TRULY operating system
//=== independent code.
//===----------------------------------------------------------------------===//
#if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_MUTEX_LOCK)
#if !defined(ENABLE_THREADS) || ENABLE_THREADS == 0
// Define all methods as no-ops if threading is explicitly disabled
namespace llvm {
using namespace sys;
Mutex::Mutex( bool recursive) { }
Mutex::~Mutex() { }
bool Mutex::acquire() { return true; }
bool Mutex::release() { return true; }
bool Mutex::tryacquire() { return true; }
}
#else
#if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_MUTEX_LOCK)
#include <cassert>
#include <pthread.h>
#include <stdlib.h>
namespace llvm {
using namespace sys;
// This variable is useful for situations where the pthread library has been
// compiled with weak linkage for its interface symbols. This allows the
// threading support to be turned off by simply not linking against -lpthread.
@@ -143,3 +156,4 @@ Mutex::tryacquire()
#else
#warning Neither LLVM_ON_UNIX nor LLVM_ON_WIN32 was set in System/Mutex.cpp
#endif
#endif