summaryrefslogtreecommitdiffstats
path: root/third_party/heimdal/include/heim_threads.h
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/heimdal/include/heim_threads.h')
-rw-r--r--third_party/heimdal/include/heim_threads.h370
1 files changed, 370 insertions, 0 deletions
diff --git a/third_party/heimdal/include/heim_threads.h b/third_party/heimdal/include/heim_threads.h
new file mode 100644
index 0000000..3ed06d9
--- /dev/null
+++ b/third_party/heimdal/include/heim_threads.h
@@ -0,0 +1,370 @@
+/*
+ * Copyright (c) 2003-2016 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* $Id$ */
+
+/*
+ * Provide wrapper macros for thread synchronization primitives so we
+ * can use native thread functions for those operating system that
+ * supports it.
+ *
+ * This is so libkrb5.so (or more importantly, libgssapi.so) can have
+ * thread support while the program that that dlopen(3)s the library
+ * don't need to be linked to libpthread.
+ */
+
+#ifndef HEIM_THREADS_H
+#define HEIM_THREADS_H 1
+
+#include <errno.h>
+
+#ifdef _MSC_VER
+
+#define HEIMDAL_THREAD_LOCAL __declspec(thread)
+
+#else
+
+#if defined(__clang__) || defined(__GNUC__) || defined(__SUNPRO_C)
+#define HEIMDAL_THREAD_LOCAL __thread
+#else
+#error "thread-local attribute not defined for your compiler"
+#endif /* clang or gcc */
+
+#endif /* _MSC_VER */
+
+/* For testing the for-Windows implementation of thread keys on non-Windows */
+typedef unsigned long HEIM_PRIV_thread_key;
+
+
+/* assume headers already included */
+
+#if defined(__NetBSD__) && __NetBSD_Version__ >= 106120000 && __NetBSD_Version__< 299001200 && defined(ENABLE_PTHREAD_SUPPORT)
+
+/*
+ * NetBSD have a thread lib that we can use that part of libc that
+ * works regardless if application are linked to pthreads or not.
+ * NetBSD newer then 2.99.11 just use pthread.h, and the same thing
+ * will happen.
+ */
+#include <threadlib.h>
+
+#define HEIMDAL_MUTEX mutex_t
+#define HEIMDAL_MUTEX_INITIALIZER MUTEX_INITIALIZER
+#define HEIMDAL_MUTEX_init(m) mutex_init(m, NULL)
+#define HEIMDAL_MUTEX_lock(m) mutex_lock(m)
+#define HEIMDAL_MUTEX_unlock(m) mutex_unlock(m)
+#define HEIMDAL_MUTEX_destroy(m) mutex_destroy(m)
+
+#define HEIMDAL_RWLOCK rwlock_t
+#define HEIMDAL_RWLOCK_INITIALIZER RWLOCK_INITIALIZER
+#define HEIMDAL_RWLOCK_init(l) rwlock_init(l, NULL)
+#define HEIMDAL_RWLOCK_rdlock(l) rwlock_rdlock(l)
+#define HEIMDAL_RWLOCK_wrlock(l) rwlock_wrlock(l)
+#define HEIMDAL_RWLOCK_tryrdlock(l) rwlock_tryrdlock(l)
+#define HEIMDAL_RWLOCK_trywrlock(l) rwlock_trywrlock(l)
+#define HEIMDAL_RWLOCK_unlock(l) rwlock_unlock(l)
+#define HEIMDAL_RWLOCK_destroy(l) rwlock_destroy(l)
+
+#define HEIMDAL_thread_key thread_key_t
+#define HEIMDAL_key_create(k,d,r) do { r = thr_keycreate(k,d); } while(0)
+#define HEIMDAL_setspecific(k,s,r) do { r = thr_setspecific(k,s); } while(0)
+#define HEIMDAL_getspecific(k) thr_getspecific(k)
+#define HEIMDAL_key_delete(k) thr_keydelete(k)
+
+#define HEIMDAL_THREAD_ID thr_t
+#define HEIMDAL_THREAD_create(t,f,a) thr_create((t), 0, (f), (a))
+
+#elif defined(ENABLE_PTHREAD_SUPPORT) && (!defined(__NetBSD__) || __NetBSD_Version__ >= 299001200)
+
+#include <pthread.h>
+
+#define HEIMDAL_MUTEX pthread_mutex_t
+#define HEIMDAL_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
+#define HEIMDAL_MUTEX_init(m) pthread_mutex_init(m, NULL)
+#define HEIMDAL_MUTEX_lock(m) pthread_mutex_lock(m)
+#define HEIMDAL_MUTEX_unlock(m) pthread_mutex_unlock(m)
+#define HEIMDAL_MUTEX_destroy(m) pthread_mutex_destroy(m)
+
+#define HEIMDAL_RWLOCK pthread_rwlock_t
+#define HEIMDAL_RWLOCK_INITIALIZER PTHREAD_RWLOCK_INITIALIZER
+#define HEIMDAL_RWLOCK_init(l) pthread_rwlock_init(l, NULL)
+#define HEIMDAL_RWLOCK_rdlock(l) pthread_rwlock_rdlock(l)
+#define HEIMDAL_RWLOCK_wrlock(l) pthread_rwlock_wrlock(l)
+#define HEIMDAL_RWLOCK_tryrdlock(l) pthread_rwlock_tryrdlock(l)
+#define HEIMDAL_RWLOCK_trywrlock(l) pthread_rwlock_trywrlock(l)
+#define HEIMDAL_RWLOCK_unlock(l) pthread_rwlock_unlock(l)
+#define HEIMDAL_RWLOCK_destroy(l) pthread_rwlock_destroy(l)
+
+#ifdef HEIM_BASE_MAINTAINER
+#define HEIMDAL_thread_key unsigned long
+#define HEIM_PRIV_thread_key HEIMDAL_thread_key
+#define HEIMDAL_key_create(k,d,r) do { r = heim_w32_key_create(k,d); } while(0)
+#define HEIMDAL_setspecific(k,s,r) do { r = heim_w32_setspecific(k,s); } while(0)
+#define HEIMDAL_getspecific(k) (heim_w32_getspecific(k))
+#define HEIMDAL_key_delete(k) (heim_w32_delete_key(k))
+#else
+#define HEIMDAL_thread_key pthread_key_t
+#define HEIMDAL_key_create(k,d,r) do { r = pthread_key_create(k,d); } while(0)
+#define HEIMDAL_setspecific(k,s,r) do { r = pthread_setspecific(k,s); } while(0)
+#define HEIMDAL_getspecific(k) pthread_getspecific(k)
+#define HEIMDAL_key_delete(k) pthread_key_delete(k)
+#endif
+
+#define HEIMDAL_THREAD_ID pthread_t
+#define HEIMDAL_THREAD_create(t,f,a) pthread_create((t), 0, (f), (a))
+
+#elif defined(_WIN32)
+
+typedef struct heim_mutex {
+ HANDLE h;
+} heim_mutex_t;
+
+static inline int
+heim_mutex_init(heim_mutex_t *m)
+{
+ m->h = CreateSemaphore(NULL, 1, 1, NULL);
+ if (m->h == INVALID_HANDLE_VALUE)
+ return EAGAIN;
+ return 0;
+}
+
+static inline int
+heim_mutex_lock(heim_mutex_t *m)
+{
+ HANDLE h, new_h;
+ int created = 0;
+
+ h = InterlockedCompareExchangePointer(&m->h, m->h, m->h);
+ if (h == INVALID_HANDLE_VALUE || h == NULL) {
+ created = 1;
+ new_h = CreateSemaphore(NULL, 0, 1, NULL);
+ if (new_h == INVALID_HANDLE_VALUE)
+ return EAGAIN;
+ if (InterlockedCompareExchangePointer(&m->h, new_h, h) != h) {
+ created = 0;
+ CloseHandle(new_h);
+ }
+ }
+ if (!created)
+ WaitForSingleObject(m->h, INFINITE);
+ return 0;
+}
+
+static inline int
+heim_mutex_unlock(heim_mutex_t *m)
+{
+ if (ReleaseSemaphore(m->h, 1, NULL) == FALSE)
+ return EPERM;
+ return 0;
+}
+
+static inline int
+heim_mutex_destroy(heim_mutex_t *m)
+{
+ HANDLE h;
+
+ h = InterlockedCompareExchangePointer(&m->h, INVALID_HANDLE_VALUE, m->h);
+ if (h != INVALID_HANDLE_VALUE)
+ CloseHandle(h);
+ return 0;
+}
+
+#define HEIMDAL_MUTEX heim_mutex_t
+#define HEIMDAL_MUTEX_INITIALIZER { INVALID_HANDLE_VALUE }
+#define HEIMDAL_MUTEX_init(m) heim_mutex_init((m))
+#define HEIMDAL_MUTEX_lock(m) heim_mutex_lock((m))
+#define HEIMDAL_MUTEX_unlock(m) heim_mutex_unlock((m))
+#define HEIMDAL_MUTEX_destroy(m) heim_mutex_destroy((m))
+
+typedef struct heim_rwlock {
+ SRWLOCK lock;
+ int exclusive;
+} heim_rwlock_t;
+
+static inline int
+heim_rwlock_init(heim_rwlock_t *l)
+{
+ InitializeSRWLock(&l->lock);
+ l->exclusive = 0;
+ return 0;
+}
+
+static inline int
+heim_rwlock_rdlock(heim_rwlock_t *l)
+{
+ AcquireSRWLockShared(&l->lock);
+ return 0;
+}
+
+static inline int
+heim_rwlock_wrlock(heim_rwlock_t *l)
+{
+ AcquireSRWLockExclusive(&l->lock);
+ l->exclusive = 1;
+ return 0;
+}
+
+static inline int
+heim_rwlock_tryrdlock(heim_rwlock_t *l)
+{
+ if (TryAcquireSRWLockShared(&l->lock))
+ return 0;
+ return EBUSY;
+}
+
+static inline int
+heim_rwlock_trywrlock(heim_rwlock_t *l)
+{
+ if (TryAcquireSRWLockExclusive(&l->lock))
+ return 0;
+ return EBUSY;
+}
+
+static inline int
+heim_rwlock_unlock(heim_rwlock_t *l)
+{
+ if (l->exclusive) {
+ l->exclusive = 0;
+ ReleaseSRWLockExclusive(&(l)->lock);
+ } else {
+ ReleaseSRWLockShared(&(l)->lock);
+ }
+ return 0;
+}
+
+static inline int
+heim_rwlock_destroy(heim_rwlock_t *l)
+{
+ /* SRW locks cannot be destroyed so re-initialize */
+ InitializeSRWLock(&l->lock);
+ l->exclusive = 0;
+ return 0;
+}
+
+#define HEIMDAL_RWLOCK heim_rwlock_t
+#define HEIMDAL_RWLOCK_INITIALIZER {SRWLOCK_INIT, 0}
+#define HEIMDAL_RWLOCK_init(l) heim_rwlock_init((l))
+#define HEIMDAL_RWLOCK_rdlock(l) heim_rwlock_rdlock((l))
+#define HEIMDAL_RWLOCK_wrlock(l) heim_rwlock_wrlock((l))
+#define HEIMDAL_RWLOCK_tryrdlock(l) heim_rwlock_tryrdlock((l))
+#define HEIMDAL_RWLOCK_trywrlock(l) heim_rwlock_trywrlock((l))
+#define HEIMDAL_RWLOCK_unlock(l) heim_rwlock_unlock((l))
+#define HEIMDAL_RWLOCK_destroy(l) heim_rwlock_destroy((l))
+
+#define HEIMDAL_thread_key unsigned long
+#define HEIM_PRIV_thread_key HEIMDAL_thread_key
+#define HEIMDAL_key_create(k,d,r) do { r = heim_w32_key_create(k,d); } while(0)
+#define HEIMDAL_setspecific(k,s,r) do { r = heim_w32_setspecific(k,s); } while(0)
+#define HEIMDAL_getspecific(k) (heim_w32_getspecific(k))
+#define HEIMDAL_key_delete(k) (heim_w32_delete_key(k))
+
+#define HEIMDAL_THREAD_ID DWORD
+#define HEIMDAL_THREAD_create(t,f,a) \
+ ((CreateThread(0, 0, (f), (a), 0, (t)) == INVALID_HANDLE_VALUE) ? EINVAL : 0)
+
+#elif defined(HEIMDAL_DEBUG_THREADS)
+
+/* no threads support, just do consistency checks */
+#include <stdlib.h>
+
+#define HEIMDAL_MUTEX int
+#define HEIMDAL_MUTEX_INITIALIZER 0
+#define HEIMDAL_MUTEX_init(m) do { (*(m)) = 0; } while(0)
+#define HEIMDAL_MUTEX_lock(m) do { if ((*(m))++ != 0) abort(); } while(0)
+#define HEIMDAL_MUTEX_unlock(m) do { if ((*(m))-- != 1) abort(); } while(0)
+#define HEIMDAL_MUTEX_destroy(m) do {if ((*(m)) != 0) abort(); } while(0)
+
+#define HEIMDAL_RWLOCK rwlock_t int
+#define HEIMDAL_RWLOCK_INITIALIZER 0
+#define HEIMDAL_RWLOCK_init(l) do { } while(0)
+#define HEIMDAL_RWLOCK_rdlock(l) do { } while(0)
+#define HEIMDAL_RWLOCK_wrlock(l) do { } while(0)
+#define HEIMDAL_RWLOCK_tryrdlock(l) do { } while(0)
+#define HEIMDAL_RWLOCK_trywrlock(l) do { } while(0)
+#define HEIMDAL_RWLOCK_unlock(l) do { } while(0)
+#define HEIMDAL_RWLOCK_destroy(l) do { } while(0)
+
+#define HEIMDAL_internal_thread_key 1
+
+#define HEIMDAL_THREAD_ID int
+#define HEIMDAL_THREAD_create(t,f,a) abort()
+
+#else /* no thread support, no debug case */
+
+#define HEIMDAL_MUTEX int
+#define HEIMDAL_MUTEX_INITIALIZER 0
+#define HEIMDAL_MUTEX_init(m) do { (void)(m); } while(0)
+#define HEIMDAL_MUTEX_lock(m) do { (void)(m); } while(0)
+#define HEIMDAL_MUTEX_unlock(m) do { (void)(m); } while(0)
+#define HEIMDAL_MUTEX_destroy(m) do { (void)(m); } while(0)
+
+#define HEIMDAL_RWLOCK rwlock_t int
+#define HEIMDAL_RWLOCK_INITIALIZER 0
+#define HEIMDAL_RWLOCK_init(l) do { } while(0)
+#define HEIMDAL_RWLOCK_rdlock(l) do { } while(0)
+#define HEIMDAL_RWLOCK_wrlock(l) do { } while(0)
+#define HEIMDAL_RWLOCK_tryrdlock(l) do { } while(0)
+#define HEIMDAL_RWLOCK_trywrlock(l) do { } while(0)
+#define HEIMDAL_RWLOCK_unlock(l) do { } while(0)
+#define HEIMDAL_RWLOCK_destroy(l) do { } while(0)
+
+#define HEIMDAL_THREAD_ID int
+#define HEIMDAL_THREAD_create(t,f,a) abort()
+
+#define HEIMDAL_internal_thread_key 1
+
+#endif /* no thread support */
+
+#ifdef HEIMDAL_internal_thread_key
+
+typedef struct heim_thread_key {
+ void *value;
+ void (*destructor)(void *);
+} heim_thread_key;
+
+#define HEIMDAL_thread_key heim_thread_key
+#define HEIMDAL_key_create(k,d,r) \
+ do { (k)->value = NULL; (k)->destructor = (d); r = 0; } while(0)
+#define HEIMDAL_setspecific(k,s,r) do { (k).value = s ; r = 0; } while(0)
+#define HEIMDAL_getspecific(k) ((k).value)
+#define HEIMDAL_key_delete(k) do { (*(k).destructor)((k).value); } while(0)
+
+#undef HEIMDAL_internal_thread_key
+#endif /* HEIMDAL_internal_thread_key */
+
+int heim_w32_key_create(HEIM_PRIV_thread_key *, void (*)(void *));
+int heim_w32_delete_key(HEIM_PRIV_thread_key);
+int heim_w32_setspecific(HEIM_PRIV_thread_key, void *);
+void *heim_w32_getspecific(HEIM_PRIV_thread_key);
+
+#endif /* HEIM_THREADS_H */