early-access version 1255

externals/libressl/include/compat/pthread.h

@@ -0,0 +1,109 @@
+/*
+ * Public domain
+ * pthread.h compatibility shim
+ */
+
+#ifndef LIBCRYPTOCOMPAT_PTHREAD_H
+#define LIBCRYPTOCOMPAT_PTHREAD_H
+
+#ifdef _WIN32
+
+#include <malloc.h>
+#include <stdlib.h>
+#include <windows.h>
+
+/*
+ * Static once initialization values.
+ */
+#define PTHREAD_ONCE_INIT   { INIT_ONCE_STATIC_INIT }
+
+/*
+ * Static mutex initialization values.
+ */
+#define PTHREAD_MUTEX_INITIALIZER	{ .lock = NULL }
+
+/*
+ * Once definitions.
+ */
+struct pthread_once {
+	INIT_ONCE once;
+};
+typedef struct pthread_once pthread_once_t;
+
+static inline BOOL CALLBACK
+_pthread_once_win32_cb(PINIT_ONCE once, PVOID param, PVOID *context)
+{
+	void (*cb) (void) = param;
+	cb();
+	return TRUE;
+}
+
+static inline int
+pthread_once(pthread_once_t *once, void (*cb) (void))
+{
+	BOOL rc = InitOnceExecuteOnce(&once->once, _pthread_once_win32_cb, cb, NULL);
+	if (rc == 0)
+		return -1;
+	else
+		return 0;
+}
+
+typedef DWORD pthread_t;
+
+static inline pthread_t
+pthread_self(void)
+{
+	return GetCurrentThreadId();
+}
+
+static inline int
+pthread_equal(pthread_t t1, pthread_t t2)
+{
+	return t1 == t2;
+}
+
+struct pthread_mutex {
+	volatile LPCRITICAL_SECTION lock;
+};
+typedef struct pthread_mutex pthread_mutex_t;
+typedef void pthread_mutexattr_t;
+
+static inline int
+pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
+{
+	if ((mutex->lock = malloc(sizeof(CRITICAL_SECTION))) == NULL)
+		exit(ENOMEM);
+	InitializeCriticalSection(mutex->lock);
+	return 0;
+}
+
+static inline int
+pthread_mutex_lock(pthread_mutex_t *mutex)
+{
+	if (mutex->lock == NULL) {
+		LPCRITICAL_SECTION lcs;
+
+		if ((lcs = malloc(sizeof(CRITICAL_SECTION))) == NULL)
+			exit(ENOMEM);
+		InitializeCriticalSection(lcs);
+		if (InterlockedCompareExchangePointer((PVOID*)&mutex->lock, (PVOID)lcs, NULL) != NULL) {
+			DeleteCriticalSection(lcs);
+			free(lcs);
+		}
+	}
+	EnterCriticalSection(mutex->lock);
+	return 0;
+}
+
+static inline int
+pthread_mutex_unlock(pthread_mutex_t *mutex)
+{
+	LeaveCriticalSection(mutex->lock);
+	return 0;
+}
+
+#else
+#include_next <pthread.h>
+#endif
+
+#endif