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80798c406c
Relying on a plain integer flag, with no synchronization primitives does not give thread-safe initialization. All reads & writes of the xmlSchemaTypesInitialized flag need to be protected by a mutex to ensure suitable memory barriers & thus correct ordering wrt any speculative execution. A separate internal initializer tied to xmlParserInit is used to create the mutex used for synchronization, similarly to how catalog.c works. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
70 lines
1.3 KiB
C
70 lines
1.3 KiB
C
#ifndef XML_THREADS_H_PRIVATE__
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#define XML_THREADS_H_PRIVATE__
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#include <libxml/threads.h>
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#ifdef LIBXML_THREAD_ENABLED
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN
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#ifdef _WIN32_WINNT
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#undef _WIN32_WINNT
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#endif
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#define _WIN32_WINNT 0x0600
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#include <windows.h>
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#define HAVE_WIN32_THREADS
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#else
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#include <pthread.h>
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#define HAVE_POSIX_THREADS
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#endif
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#endif
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/*
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* xmlMutex are a simple mutual exception locks
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*/
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struct _xmlMutex {
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#ifdef HAVE_POSIX_THREADS
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pthread_mutex_t lock;
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#elif defined HAVE_WIN32_THREADS
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CRITICAL_SECTION cs;
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#else
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int empty;
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#endif
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};
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/*
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* xmlRMutex are reentrant mutual exception locks
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*/
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struct _xmlRMutex {
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#ifdef HAVE_POSIX_THREADS
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pthread_mutex_t lock;
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unsigned int held;
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unsigned int waiters;
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pthread_t tid;
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pthread_cond_t cv;
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#elif defined HAVE_WIN32_THREADS
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CRITICAL_SECTION cs;
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#else
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int empty;
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#endif
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};
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XML_HIDDEN void
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xmlInitMutex(xmlMutex *mutex);
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XML_HIDDEN void
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xmlCleanupMutex(xmlMutex *mutex);
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XML_HIDDEN void
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xmlInitRMutex(xmlRMutex *mutex);
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XML_HIDDEN void
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xmlCleanupRMutex(xmlRMutex *mutex);
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#ifdef LIBXML_SCHEMAS_ENABLED
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XML_HIDDEN void
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xmlInitSchemasTypesInternal(void);
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XML_HIDDEN void
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xmlCleanupSchemasTypesInternal(void);
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#endif
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#endif /* XML_THREADS_H_PRIVATE__ */
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