1 files changed, 69 insertions, 0 deletions
diff --git a/public/vstdlib/coroutine.h b/public/vstdlib/coroutine.h
new file mode 100644
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+++ b/public/vstdlib/coroutine.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: setjmp/longjmp based cooperative multitasking system
+//
+//=============================================================================
+
+#ifndef COROUTINE_H
+#define COROUTINE_H
+#pragma once
+
+#include "vstdlib/vstdlib.h"
+
+// enable this to do coroutine tracing
+// this will tell coroutine API users to set coroutine names
+// #define COROUTINE_TRACE
+
+//-----------------------------------------------------------------------------
+// Purpose: handles running coroutines
+//			setjmp/longjmp based cooperative multitasking system
+//-----------------------------------------------------------------------------
+
+// coroutine callback
+typedef void (__cdecl *CoroutineFunc_t )(void *);
+
+// handle to a coroutine
+typedef int32 HCoroutine;
+
+// creates a new coroutine
+// no coroutine code is executed until Coroutine_Continue() is called
+VSTDLIB_INTERFACE HCoroutine Coroutine_Create( CoroutineFunc_t pFunc, void *pvParam );
+
+// continues the specified coroutine
+// returns true if the coroutine is still running, false otherwise
+VSTDLIB_INTERFACE bool Coroutine_Continue( HCoroutine hCoroutine, const char *pchName = NULL );
+
+// cancels a currently running coroutine
+VSTDLIB_INTERFACE void Coroutine_Cancel( HCoroutine hCoroutine );
+
+// 'load' a coroutine only to debug it - immediately breaks into debugger
+// when continued, pops back to the prior coroutine
+VSTDLIB_INTERFACE void Coroutine_DebugBreak( HCoroutine hCoroutine );
+
+// Load a coroutine and generate an assert.  Used to get a minidump of a job
+VSTDLIB_INTERFACE void Coroutine_DebugAssert( HCoroutine hCoroutine, const char *pchMsg );
+
+// called from the coroutine to return control to the main thread
+VSTDLIB_INTERFACE void Coroutine_YieldToMain();
+
+// returns true if the code is currently running inside of a coroutine
+VSTDLIB_INTERFACE bool Coroutine_IsActive();
+
+// returns a handle the currently active coroutine
+VSTDLIB_INTERFACE HCoroutine Coroutine_GetCurrentlyActive();
+
+// call when a thread is quiting to release any per-thread memory
+VSTDLIB_INTERFACE void Coroutine_ReleaseThreadMemory();
+
+// runs a self-test of the coroutine system
+VSTDLIB_INTERFACE bool Coroutine_Test();
+
+// memory validation 
+VSTDLIB_INTERFACE void Coroutine_ValidateGlobals( class CValidator &validator );
+
+// for debugging purposes - returns stack depth of current coroutine
+VSTDLIB_INTERFACE size_t Coroutine_GetStackDepth();
+
+
+
+#endif // COROUTINE_H