Fix Windows build for 1.7 release (pthread stuff)

src/jv_thread.h

@@ -0,0 +1,72 @@
+#ifndef JV_THREAD_H
+#define JV_THREAD_H
+
+#ifdef WIN32
+#include <windows.h>
+#include <winnt.h>
+#include <errno.h>
+
+/* Copied from Heimdal: pthread-like mutexes for WIN32 -- see lib/base/heimbase.h in Heimdal */
+typedef struct pthread_mutex {
+    HANDLE      h;
+} pthread_mutex_t;
+
+#define PTHREAD_MUTEX_INITIALIZER { INVALID_HANDLE_VALUE }
+
+static inline int
+pthread_mutex_init(pthread_mutex_t *m)
+{
+    m->h = CreateSemaphore(NULL, 1, 1, NULL);
+    if (m->h == INVALID_HANDLE_VALUE)
+        return EAGAIN;
+    return 0;
+}
+
+static inline int
+pthread_mutex_lock(pthread_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
+pthread_mutex_unlock(pthread_mutex_t *m)
+{
+    if (ReleaseSemaphore(m->h, 1, NULL) == FALSE)
+        return EPERM;
+    return 0;
+}
+static inline int
+pthread_mutex_destroy(pthread_mutex_t *m)
+{
+    HANDLE h;
+
+    h = InterlockedCompareExchangePointer(&m->h, INVALID_HANDLE_VALUE, m->h);
+    if (h != INVALID_HANDLE_VALUE)
+        CloseHandle(h);
+    return 0;
+}
+
+typedef unsigned long pthread_key_t;
+int pthread_key_create(pthread_key_t *, void (*)(void *));
+int pthread_setspecific(pthread_key_t, void *);
+void *pthread_getspecific(pthread_key_t);
+#else
+#include <pthread.h>
+#endif
+#endif /* JV_THREAD_H */