mach_dep.c

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/* Routine to mark from registers that are preserved by the C compiler.
** This must be ported to every new architecture.
*/

/* This is a NeXT specific file. It makes things easier to follow.
** Right now I can only test the Motorola specific code. 
**
** Jason
*/

#include "gc_private.h"

#include <mach/mach.h>
#include <mach/thread_status.h>


static void next_push_regs (void)
{
	thread_t my_thread = thread_self ();
	thread_array_t threads;
	u_int t_cnt, reg_cnt, ndx, r_ndx;
	thread_state_t state_regs[M68K_THREAD_STATE_REGS_COUNT];
	thread_state_t user_regs[M68K_THREAD_STATE_USER_REG_COUNT];
	kern_return_t stat;
	
	stat = task_threads (task_self(), &threads, &t_cnt);
	
	for (ndx = 0; ndx < t_cnt; ++ndx) {
		if (threads[ndx] == my_thread) 
			continue;
		reg_cnt = M68K_THREAD_STATE_REGS_COUNT;
		stat = thread_get_state (threads[ndx], 
														 M68K_THREAD_STATE_REGS, state_regs, &reg_cnt);
		if (stat == KERN_SUCCESS) {
			for (r_ndx = 0; r_ndx < reg_cnt; ++r_ndx)
				GC_push_one (state_regs[r_ndx]);
		}
	}
}

/* Do this in a seperate thread so it can get at all the other
** thread registers. A thread can't get its own registers in the same way.
*/

void GC_push_regs (void)
{
	cthread_join (cthread_fork (next_push_regs, NULL));
}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.