LLVM  10.0.0svn
ThreadLocal.inc
Go to the documentation of this file.
1 //=== llvm/Support/Unix/ThreadLocal.inc - Unix Thread Local Data -*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the Unix specific (non-pthread) ThreadLocal class.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 //===----------------------------------------------------------------------===//
14 //=== WARNING: Implementation here must contain only generic UNIX code that
15 //=== is guaranteed to work on *all* UNIX variants.
16 //===----------------------------------------------------------------------===//
17 
18 #include "llvm/Config/config.h"
19 
20 #if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_GETSPECIFIC)
21 
22 #include <cassert>
23 #include <pthread.h>
24 #include <stdlib.h>
25 
26 namespace llvm {
27 using namespace sys;
28 
30  static_assert(sizeof(pthread_key_t) <= sizeof(data), "size too big");
31  pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);
32  int errorcode = pthread_key_create(key, nullptr);
33  assert(errorcode == 0);
34  (void) errorcode;
35 }
36 
38  pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);
39  int errorcode = pthread_key_delete(*key);
40  assert(errorcode == 0);
41  (void) errorcode;
42 }
43 
44 void ThreadLocalImpl::setInstance(const void* d) {
45  pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);
46  int errorcode = pthread_setspecific(*key, d);
47  assert(errorcode == 0);
48  (void) errorcode;
49 }
50 
52  pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);
53  return pthread_getspecific(*key);
54 }
55 
57  setInstance(nullptr);
58 }
59 
60 }
61 #else
62 namespace llvm {
63 using namespace sys;
66 void ThreadLocalImpl::setInstance(const void* d) { data = const_cast<void*>(d);}
67 void *ThreadLocalImpl::getInstance() { return data; }
68 void ThreadLocalImpl::removeInstance() { setInstance(0); }
69 }
70 #endif
This class represents lattice values for constants.
Definition: AllocatorList.h:23
void setInstance(const void *d)
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())