/usr/lib/gcc-cross/arm-linux-gnueabi/5/include/d/gcc/gthreads/win32.d is in libphobos-5-dev-armel-cross 5.3.1-14ubuntu2cross1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 | /* GDC -- D front-end for GCC
Copyright (C) 2013 Free Software Foundation, Inc.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>.
*/
// GNU/GCC threads interface routines for D.
// This must match gthr-win32.h
module gcc.gthreads.win32;
/* Windows32 threads specific definitions. The windows32 threading model
does not map well into pthread-inspired gcc's threading model, and so
there are caveats one needs to be aware of.
1. The destructor supplied to gthread_key_create is ignored for
generic x86-win32 ports.
However, Mingw runtime (version 0.3 or newer) provides a mechanism
to emulate pthreads key dtors; the runtime provides a special DLL,
linked in if -mthreads option is specified, that runs the dtors in
the reverse order of registration when each thread exits. If
-mthreads option is not given, a stub is linked in instead of the
DLL, which results in memory leak. Other x86-win32 ports can use
the same technique of course to avoid the leak.
2. The error codes returned are non-POSIX like, and cast into ints.
This may cause incorrect error return due to truncation values on
hw where DWORD.sizeof > int.sizeof.
The basic framework should work well enough. In the long term, GCC
needs to use Structured Exception Handling on Windows32. */
import core.sys.windows.windows;
import core.stdc.errno;
alias gthread_key_t = ULONG;
struct gthread_once_t
{
INT done;
LONG started;
}
alias gthread_mutex_t = CRITICAL_SECTION;
alias gthread_recursive_mutex_t = CRITICAL_SECTION;
enum GTHREAD_MUTEX_INIT = CRITICAL_SECTION.init;
enum GTHREAD_ONCE_INIT = gthread_once_t(0, -1);
enum GTHREAD_RECURSIVE_MUTEX_INIT = CRITICAL_SECTION.init;
version (MinGW)
{
// Mingw runtime >= v0.3 provides a magic variable that is set to nonzero
// if -mthreads option was specified, or 0 otherwise.
extern(C)
{
extern __gshared int _CRT_MT;
extern nothrow int __mingwthr_key_dtor(ULONG, void function(void*));
}
}
// Backend thread functions
extern(C):
@trusted:
nothrow:
int gthread_active_p()
{
version (MinGW)
return _CRT_MT;
else
return 1;
}
int gthread_once(gthread_once_t* once, void function() nothrow func)
{
if (! gthread_active_p())
return -1;
else if (once == null || func == null)
return EINVAL;
if (! once.done)
{
if (InterlockedIncrement(&(once.started)) == 0)
{
func();
once.done = TRUE;
}
else
{
/* Another thread is currently executing the code, so wait for it
to finish; yield the CPU in the meantime. If performance
does become an issue, the solution is to use an Event that
we wait on here (and set above), but that implies a place to
create the event before this routine is called. */
while (! once.done)
Sleep(0);
}
}
return 0;
}
/* Windows32 thread local keys don't support destructors; this leads to
leaks, especially in threaded applications making extensive use of
C++ EH. Mingw uses a thread-support DLL to work-around this problem. */
int gthread_key_create(gthread_key_t* key, void function(void*) dtor)
{
DWORD tlsindex = TlsAlloc();
if (tlsindex != 0xFFFFFFFF)
{
*key = tlsindex;
/* Mingw runtime will run the dtors in reverse order for each thread
when the thread exits. */
version (MinGW)
return __mingwthr_key_dtor(*key, dtor);
}
else
return GetLastError();
}
int gthread_key_delete(gthread_key_t key)
{
if (TlsFree(key) != 0)
return 0;
else
return GetLastError();
}
void* gthread_getspecific(gthread_key_t key)
{
DWORD lasterror = GetLastError();
void* ptr = TlsGetValue(key);
SetLastError(lasterror);
return ptr;
}
int gthread_setspecific(gthread_key_t key, in void* ptr)
{
if (TlsSetValue(key, cast(void*) ptr) != 0)
return 0;
else
return GetLastError();
}
void gthread_mutex_init(gthread_mutex_t* mutex)
{
InitializeCriticalSection(mutex);
}
int gthread_mutex_destroy(gthread_mutex_t* mutex)
{
DeleteCriticalSection(mutex);
return 0;
}
int gthread_mutex_lock(gthread_mutex_t* mutex)
{
if (gthread_active_p())
EnterCriticalSection(mutex);
return 0;
}
int gthread_mutex_trylock(gthread_mutex_t* mutex)
{
if (gthread_active_p())
return TryEnterCriticalSection(mutex);
else
return 0;
}
int gthread_mutex_unlock(gthread_mutex_t* mutex)
{
if (gthread_active_p())
LeaveCriticalSection(mutex);
return 0;
}
int gthread_recursive_mutex_init(gthread_mutex_t* mutex)
{
gthread_mutex_init(mutex);
return 0;
}
int gthread_recursive_mutex_lock(gthread_recursive_mutex_t* mutex)
{
return gthread_mutex_lock(mutex);
}
int gthread_recursive_mutex_trylock(gthread_recursive_mutex_t* mutex)
{
return gthread_mutex_trylock(mutex);
}
int gthread_recursive_mutex_unlock(gthread_recursive_mutex_t* mutex)
{
return gthread_mutex_unlock(mutex);
}
int gthread_recursive_mutex_destroy(gthread_recursive_mutex_t* mutex)
{
return gthread_mutex_destroy(mutex);
}
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