Commented (per Kale's request) not removed libcothread usage in core (requires clean build), (no whatsnew)

We can safely remove comments and cothread.* from /emu and /lib/cothread if it's confirmed way to go

makefile

@@ -621,9 +621,6 @@ SOFTFLOAT = $(OBJ)/libsoftfloat.a
 # add formats emulation library
 FORMATS_LIB = $(OBJ)/libformats.a
 
-# add cothread library
-COTHREAD = $(OBJ)/libco.a
-
 
 
 #-------------------------------------------------
@@ -726,9 +723,9 @@ $(sort $(OBJDIRS)):
 ifndef EXECUTABLE_DEFINED
 
 # always recompile the version string
-$(VERSIONOBJ): $(DRVLIBS) $(LIBOSD) $(LIBCPU) $(LIBEMU) $(LIBSOUND) $(LIBUTIL) $(EXPAT) $(ZLIB) $(SOFTFLOAT) $(FORMATS_LIB) $(COTHREAD) $(LIBOCORE) $(RESFILE)
+$(VERSIONOBJ): $(DRVLIBS) $(LIBOSD) $(LIBCPU) $(LIBEMU) $(LIBSOUND) $(LIBUTIL) $(EXPAT) $(ZLIB) $(SOFTFLOAT) $(FORMATS_LIB) $(LIBOCORE) $(RESFILE)
 
-$(EMULATOR): $(VERSIONOBJ) $(EMUINFOOBJ) $(DRIVLISTOBJ) $(DEVLISTOBJ) $(DRVLIBS) $(LIBOSD) $(LIBCPU) $(LIBEMU) $(LIBDASM) $(LIBSOUND) $(LIBUTIL) $(EXPAT) $(SOFTFLOAT) $(FORMATS_LIB) $(COTHREAD) $(ZLIB) $(LIBOCORE) $(RESFILE)
+$(EMULATOR): $(VERSIONOBJ) $(EMUINFOOBJ) $(DRIVLISTOBJ) $(DEVLISTOBJ) $(DRVLIBS) $(LIBOSD) $(LIBCPU) $(LIBEMU) $(LIBDASM) $(LIBSOUND) $(LIBUTIL) $(EXPAT) $(SOFTFLOAT) $(FORMATS_LIB) $(ZLIB) $(LIBOCORE) $(RESFILE)
 	@echo Linking $@...
 	$(LD) $(LDFLAGS) $(LDFLAGSEMULATOR) $^ $(LIBS) -o $@
 ifeq ($(TARGETOS),win32)

src/emu/diexec.c

@@ -73,7 +73,7 @@ const int TRIGGER_SUSPENDTIME	= -4000;
 
 device_execute_interface::device_execute_interface(const machine_config &mconfig, device_t &device)
 	: device_interface(device),
-	  m_cothread(cothread_entry_delegate(FUNC(device_execute_interface::run_thread_wrapper), this)),
+//	  m_cothread(cothread_entry_delegate(FUNC(device_execute_interface::run_thread_wrapper), this)),
 	  m_disabled(false),
 	  m_vblank_interrupt(NULL),
 	  m_vblank_interrupts_per_frame(0),
@@ -377,7 +377,7 @@ UINT64 device_execute_interface::total_cycles() const
 //  which just calls run and then returns to the
 //  scheduler thread, over and over
 //-------------------------------------------------
-
+/*
 void device_execute_interface::run_thread_wrapper()
 {
 	// loop infinitely
@@ -389,7 +389,7 @@ void device_execute_interface::run_thread_wrapper()
         scheduler.make_active();
     }
 }
-
+*/
 
 //-------------------------------------------------
 //  execute_clocks_to_cycles - convert the number

src/emu/diexec.h

@@ -48,7 +48,7 @@
 
 
 // set to 1 to execute on cothread instead of directly
-#define USE_COTHREADS 1
+//#define USE_COTHREADS 1
 
 
 //**************************************************************************
@@ -204,11 +204,11 @@ public:
 	UINT64 total_cycles() const;
 
 	// required operation overrides
-#if USE_COTHREADS
+//#if USE_COTHREADS
-	void run() { m_cothread.make_active(); }
+//	void run() { m_cothread.make_active(); }
-#else
+//#else
 	void run() { execute_run(); }
-#endif
+//#endif
 
 protected:
 	// internal helpers
@@ -272,7 +272,7 @@ protected:
 	};
 
 	// internal state
-	cothread				m_cothread;					// thread used for execution
+//	cothread				m_cothread;					// thread used for execution
 
 	// configuration
 	bool					m_disabled;					// disabled from executing?

src/emu/emu.h

@@ -65,7 +65,7 @@
 #include "hash.h"
 #include "fileio.h" // remove me once NVRAM is implemented as device
 #include "delegate.h"
-#include "cothread.h"
+//#include "cothread.h"
 
 // memory and address spaces
 #include "memory.h"

src/emu/emu.mak

@@ -51,7 +51,6 @@ EMUOBJS = \
 	$(EMUOBJ)/cheat.o \
 	$(EMUOBJ)/clifront.o \
 	$(EMUOBJ)/config.o \
-	$(EMUOBJ)/cothread.o \
 	$(EMUOBJ)/crsshair.o \
 	$(EMUOBJ)/debugger.o \
 	$(EMUOBJ)/delegate.o \

src/emu/schedule.c

@@ -341,7 +341,7 @@ device_scheduler::device_scheduler(running_machine &machine) :
 	m_executing_device(NULL),
 	m_execute_list(NULL),
 	m_basetime(attotime::zero),
-	m_cothread(co_active()),
+//	m_cothread(co_active()),
 	m_timer_list(NULL),
 	m_timer_allocator(machine.respool()),
 	m_callback_timer(NULL),

src/emu/schedule.h

@@ -165,7 +165,7 @@ public:
 	void abort_timeslice();
 	void trigger(int trigid, attotime after = attotime::zero);
 	void boost_interleave(attotime timeslice_time, attotime boost_duration);
-	void make_active() { m_cothread.make_active(); }
+//	void make_active() { m_cothread.make_active(); }
 
 	// timers, specified by callback/name
 	emu_timer *timer_alloc(timer_expired_delegate callback, void *ptr = NULL);
@@ -210,7 +210,7 @@ private:
 	device_execute_interface *	m_executing_device;			// pointer to currently executing device
 	device_execute_interface *	m_execute_list;				// list of devices to be executed
 	attotime					m_basetime;					// global basetime; everything moves forward from here
-	cothread					m_cothread;					// core scheduler thread
+//	cothread					m_cothread;					// core scheduler thread
 
 	// list of active timers
 	emu_timer *					m_timer_list;				// head of the active list

src/lib/lib.mak

@@ -19,7 +19,6 @@ OBJDIRS += \
 	$(LIBOBJ)/formats \
 	$(LIBOBJ)/zlib \
 	$(LIBOBJ)/softfloat \
-	$(LIBOBJ)/cothread \
 
 
 
@@ -204,18 +203,3 @@ $(OBJ)/libsoftfloat.a: $(SOFTFLOATOBJS)
 
 $(LIBOBJ)/softfloat/softfloat.o: $(LIBSRC)/softfloat/softfloat.c $(LIBSRC)/softfloat/softfloat.h $(LIBSRC)/softfloat/softfloat-macros $(LIBSRC)/softfloat/softfloat-specialize
 $(LIBOBJ)/softfloat/fsincos.o: $(LIBSRC)/softfloat/fsincos.c $(LIBSRC)/softfloat/fpu_constant.h $(LIBSRC)/softfloat/softfloat.h $(LIBSRC)/softfloat/softfloat-macros $(LIBSRC)/softfloat/softfloat-specialize
-
-
-
-#-------------------------------------------------
-# cothread library objects
-#-------------------------------------------------
-
-COTHREADOBJS = \
-	$(LIBOBJ)/cothread/libco.o
-
-$(OBJ)/libco.a: $(COTHREADOBJS)
-
-$(LIBOBJ)/cothread/%.o: $(LIBSRC)/cothread/%.c | $(OSPREBUILD)
-	@echo Compiling $<...
-	$(CC) $(CDEFS) $(CCOMFLAGS) -c -fomit-frame-pointer $< -o $@