Bitcoin Core  0.20.99
P2P Digital Currency
threadnames.cpp
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1 // Copyright (c) 2018-2019 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #if defined(HAVE_CONFIG_H)
7 #endif
8 
9 #include <thread>
10 
11 #if (defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__))
12 #include <pthread.h>
13 #include <pthread_np.h>
14 #endif
15 
16 #include <util/threadnames.h>
17 
18 #ifdef HAVE_SYS_PRCTL_H
19 #include <sys/prctl.h> // For prctl, PR_SET_NAME, PR_GET_NAME
20 #endif
21 
24 static void SetThreadName(const char* name)
25 {
26 #if defined(PR_SET_NAME)
27  // Only the first 15 characters are used (16 - NUL terminator)
28  ::prctl(PR_SET_NAME, name, 0, 0, 0);
29 #elif (defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__))
30  pthread_set_name_np(pthread_self(), name);
31 #elif defined(MAC_OSX)
32  pthread_setname_np(name);
33 #else
34  // Prevent warnings for unused parameters...
35  (void)name;
36 #endif
37 }
38 
39 // If we have thread_local, just keep thread ID and name in a thread_local
40 // global.
41 #if defined(HAVE_THREAD_LOCAL)
42 
43 static thread_local std::string g_thread_name;
44 const std::string& util::ThreadGetInternalName() { return g_thread_name; }
47 static void SetInternalName(std::string name) { g_thread_name = std::move(name); }
48 
49 // Without thread_local available, don't handle internal name at all.
50 #else
51 
52 static const std::string empty_string;
53 const std::string& util::ThreadGetInternalName() { return empty_string; }
54 static void SetInternalName(std::string name) { }
55 #endif
56 
57 void util::ThreadRename(std::string&& name)
58 {
59  SetThreadName(("b-" + name).c_str());
60  SetInternalName(std::move(name));
61 }
62 
63 void util::ThreadSetInternalName(std::string&& name)
64 {
65  SetInternalName(std::move(name));
66 }
static void SetInternalName(std::string name)
Definition: threadnames.cpp:54
void ThreadRename(std::string &&)
Rename a thread both in terms of an internal (in-memory) name as well as its system thread name...
Definition: threadnames.cpp:57
const char * name
Definition: rest.cpp:41
void ThreadSetInternalName(std::string &&)
Set the internal (in-memory) name of the current thread only.
Definition: threadnames.cpp:63
const std::string & ThreadGetInternalName()
Get the thread&#39;s internal (in-memory) name; used e.g.
Definition: threadnames.cpp:53
static const std::string empty_string
Definition: threadnames.cpp:52
static void SetThreadName(const char *name)
Set the thread&#39;s name at the process level.
Definition: threadnames.cpp:24