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diff --git a/innobase/include/os0thread.h b/innobase/include/os0thread.h
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+/******************************************************
+The interface to the operating system
+process and thread control primitives
+
+(c) 1995 Innobase Oy
+
+Created 9/8/1995 Heikki Tuuri
+*******************************************************/
+
+#ifndef os0thread_h
+#define os0thread_h
+
+#include "univ.i"
+
+/* Maximum number of threads which can be created in the program */
+#define	OS_THREAD_MAX_N		1000
+
+/* Possible fixed priorities for threads */
+#define OS_THREAD_PRIORITY_NONE		100
+#define OS_THREAD_PRIORITY_BACKGROUND	1
+#define OS_THREAD_PRIORITY_NORMAL	2
+#define OS_THREAD_PRIORITY_ABOVE_NORMAL	3
+
+#ifdef __WIN__
+typedef void*			os_thread_t;
+#else
+typedef pthread_t               os_thread_t;
+#endif
+typedef	unsigned long int	os_thread_id_t;
+
+/********************************************************************
+Creates a new thread of execution. The execution starts from
+the function given. The start function takes a void* parameter
+and returns a ulint. */
+
+os_thread_t
+os_thread_create(
+/*=============*/
+						/* out: handle to the thread */
+	ulint (*start_f)(void*),		/* in: pointer to function
+						from which to start */
+	void*			arg,		/* in: argument to start
+						function */
+	os_thread_id_t*		thread_id);	/* out: id of created
+						thread */	
+/*********************************************************************
+A thread calling this function ends its execution. */
+
+void
+os_thread_exit(
+/*===========*/
+	ulint	code);	/* in: exit code */
+/*********************************************************************
+Returns the thread identifier of current thread. */
+
+os_thread_id_t
+os_thread_get_curr_id(void);
+/*========================*/
+/*********************************************************************
+Returns handle to the current thread. */
+
+os_thread_t
+os_thread_get_curr(void);
+/*====================*/
+/*********************************************************************
+Converts a thread id to a ulint. */
+
+ulint
+os_thread_conv_id_to_ulint(
+/*=======================*/
+				/* out: converted to ulint */
+	os_thread_id_t	id);	/* in: thread id */
+/*********************************************************************
+Waits for a thread to terminate. */
+
+void
+os_thread_wait(
+/*===========*/
+	os_thread_t	thread);	/* in: thread to wait */
+/*********************************************************************
+Advises the os to give up remainder of the thread's time slice. */
+
+void
+os_thread_yield(void);
+/*=================*/
+/*********************************************************************
+The thread sleeps at least the time given in microseconds. */
+
+void
+os_thread_sleep(
+/*============*/
+	ulint	tm);	/* in: time in microseconds */
+/**********************************************************************
+Gets a thread priority. */
+
+ulint
+os_thread_get_priority(
+/*===================*/
+				/* out: priority */
+	os_thread_t	handle);/* in: OS handle to the thread */
+/**********************************************************************
+Sets a thread priority. */
+
+void
+os_thread_set_priority(
+/*===================*/
+	os_thread_t	handle,	/* in: OS handle to the thread */
+	ulint		pri);	/* in: priority: one of OS_PRIORITY_... */
+/**********************************************************************
+Gets the last operating system error code for the calling thread. */
+
+ulint
+os_thread_get_last_error(void);
+/*==========================*/
+
+
+#ifndef UNIV_NONINL
+#include "os0thread.ic"
+#endif
+
+#endif