#include "config.h"

#include <mono/utils/mono-threads.h>
#include <mono/utils/mono-mmap.h>

#if defined (USE_WASM_BACKEND)

#define round_down(addr, val) ((void*)((addr) & ~((val) - 1)))

int
mono_threads_get_max_stack_size (void)
{
	return 65536 * 8; //totally arbitrary, this value is actually useless until WASM supports multiple threads.
}


void
mono_threads_suspend_init_signals (void)
{
}

void
mono_threads_suspend_init (void)
{
}

void
mono_threads_suspend_register (MonoThreadInfo *info)
{
}

gboolean
mono_threads_suspend_begin_async_resume (MonoThreadInfo *info)
{
	return TRUE;
}

void
mono_threads_suspend_free (MonoThreadInfo *info)
{
}

gboolean
mono_threads_suspend_begin_async_suspend (MonoThreadInfo *info, gboolean interrupt_kernel)
{
	return TRUE;
}

gboolean
mono_threads_suspend_check_suspend_result (MonoThreadInfo *info)
{
	return TRUE;
}

void
mono_threads_suspend_abort_syscall (MonoThreadInfo *info)
{
}

//----

gboolean
mono_native_thread_id_equals (MonoNativeThreadId id1, MonoNativeThreadId id2)
{
	return id1 == id2;
}


MonoNativeThreadId
mono_native_thread_id_get (void)
{
	return (MonoNativeThreadId)1;
}

MONO_API gboolean
mono_native_thread_create (MonoNativeThreadId *tid, gpointer func, gpointer arg)
{
	g_error ("WASM doesn't support threading");
}

static const char *thread_name;

void
mono_native_thread_set_name (MonoNativeThreadId tid, const char *name)
{
	thread_name = g_strdup (name);
}

gboolean
mono_native_thread_join (MonoNativeThreadId tid)
{
	g_error ("WASM doesn't support threading");
	return FALSE;
}

//----

gboolean
mono_threads_platform_yield (void)
{
	return TRUE;
}

void
mono_threads_platform_get_stack_bounds (guint8 **staddr, size_t *stsize)
{
	*staddr = round_down ((size_t)&staddr, 65536); //WASM pagesize is 64k
	*stsize = 65536 * 4; //we say it's 4 pages, there isn't much that uses this beyond the GC
}


gboolean
mono_thread_platform_create_thread (MonoThreadStart thread_fn, gpointer thread_data, gsize* const stack_size, MonoNativeThreadId *tid)
{
	g_error ("WASM doesn't support threading");
	return FALSE;
}

void mono_threads_platform_init (void)
{
}

void
mono_threads_platform_exit (gsize exit_code)
{
	g_error ("WASM doesn't support threading");
}

gboolean
mono_threads_platform_in_critical_region (MonoNativeThreadId tid)
{
	return FALSE;
}

#endif