feature merge bs-coreoptimize->trunk: Atomic Operations, Threading, Spinlock implemnetation. [commit 1/2, windows will followup]

- Added Abstractions for Atomic Operations (lock instructions.. windows guy's may now this as Interlocked* stuff ..)
- Added Threading api abstraction for Pthread based OS's and Windows
- Added Spinlock Implementation (uses CAS / if you need more informations - just read the source - its simple.)

- Due to Interlocked(Compare)Exchange64 .. we now require at least i686 (Pentium Pro) for 32Bit Builds :)
	youll also may feel some performance improvements when using 32bit builsd due to "newer" minimal arch
	the compiler is now able to use CMOV's ....


================================================================
= Important Warning: 
================================================================
Dont use threading at the moment athena is not threadsafe!
you'll mess up everthing when accessing data from other threads .., no synchronization is provided.

A way to process tasks asynchronously will come up after / with the new socket system.




git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@16221 54d463be-8e91-2dee-dedb-b68131a5f0ec

1 files changed, 115 insertions, 0 deletions

diff --git a/src/common/thread.h b/src/common/thread.h
new file mode 100644
index 000000000..d4027811f
--- /dev/null
+++ b/src/common/thread.h
@@ -0,0 +1,115 @@
+#pragma once 
+#ifndef _rA_THREAD_H_
+#define _rA_THREAD_H_
+
+#include "../common/cbasetypes.h"
+
+typedef struct rAthread *rAthread;
+typedef void* (*rAthreadProc)(void*);
+
+typedef enum RATHREAD_PRIO {
+	RAT_PRIO_LOW = 0,
+	RAT_PRIO_NORMAL,
+	RAT_PRIO_HIGH	
+} RATHREAD_PRIO;
+
+
+/**
+ * Creates a new Thread
+ *
+ * @param entyPoint  - entryProc,
+ * @param param - general purpose parameter, would be given as parameter to the thread's entrypoint.
+ * 
+ * @return not NULL if success
+ */
+rAthread rathread_create( rAthreadProc entryPoint,  void *param );
+
+
+/** 
+ * Creates a new Thread (with more creation options)
+ *
+ * @param entyPoint  - entryProc,
+ * @param param - general purpose parameter, would be given as parameter to the thread's entrypoint
+ * @param szStack - stack Size in bytes 
+ * @param prio - Priority of the Thread @ OS Scheduler..
+ *
+ * @return not NULL if success
+ */
+rAthread rathread_createEx( rAthreadProc entryPoint,  void *param,  size_t szStack,  RATHREAD_PRIO prio );
+
+
+/**
+ * Destroys the given Thread immediatly
+ *
+ * @note The Handle gets invalid after call! dont use it afterwards. 
+ *
+ * @param handle - thread to destroy.
+ */
+void rathread_destroy ( rAthread handle );
+
+
+/** 
+ * Returns the thread handle of the thread calling this function
+ * 
+ * @note this wont work @ programms main thread
+ * @note the underlying implementation might not perform very well, cache the value received! 
+ * 
+ * @return not NULL if success
+ */
+rAthread rathread_self( );
+
+
+/**
+ * Returns own thrad id (TID) 
+ *
+ * @note this is not the operating system THREAD ID!
+ *
+ * @return -1 when fails, otherwise >= 0
+ */
+int rathread_get_tid();
+
+
+/**
+ * Waits for the given thread to terminate 
+ *
+ * @param handle - thread to wait (join) for
+ * @param out_Exitcode - [OPTIONAL] - if given => Exitcode (value) of the given thread - if it's terminated
+ * 
+ * @return true - if the given thread has been terminated.
+ */
+bool rathread_wait( rAthread handle,  void* *out_exitCode );
+
+
+/** 
+ * Sets the given PRIORITY @ OS Task Scheduler
+ * 
+ * @param handle - thread to set prio for
+ * @param rio - the priority (RAT_PRIO_LOW ... )
+ */
+void rathread_prio_set( rAthread handle, RATHREAD_PRIO prio );
+
+
+/** 
+ * Gets the current Prio of the given trhead
+ *
+ * @param handle - the thread to get the prio for.
+ */
+RATHREAD_PRIO rathread_prio_get( rAthread handle);
+
+
+/**
+ * Tells the OS scheduler to yield the execution of the calling thread
+ * 
+ * @note: this will not "pause" the thread,
+ *			it just allows the OS to spent the remaining time 
+ *			of the slice to another thread.
+ */
+void rathread_yield();
+
+
+
+void rathread_init();
+void rathread_final();
+
+
+#endif