Thread locals api wrapper

[awsdert]

When looking for the linux equivalents of TlsAlloc etc I found none, since nobody who uses the library I'm making would want to have to check what operating system they're on I've resorted to a wrapper that mimics it as best it can, wandering what you guys think of it. Can it be made better?

#	ifdef PAW_API_MSW
#		define PAWTLS
#		define PAWTLS_API_BASED
#	elif (__GNUC__)
#		define PAWTLS __thread
#	elif defined( _MSC )
#		define PAWTLS _declspec(thread)
#	elif PAW_STDC >= 202300L
#		include <threads.h>
#		define PAWTLS thread_local
#	elif PAW_STDC >= 201113L
#		define PAWTLS _Thread_local
#	else
#		define PAWTLS
#		define PAWTLS_NO_LOCALS
#	endif

Windows:

PAWAPP_API void*  pawtls_create(void) { return (void*)1; }
PAWAPP_API pawvu  pawtls_newloc( void *tls, pawvu size )
	{ (void)tls; (void)size; return TlsAlloc(); }
PAWAPP_API void   pawtls_remloc( void *tls, pawvu i )
	{ (void)tls; TlsFree(i); }
PAWAPP_API void*  pawtls_getloc( void *tls, pawvu i )
	{ (void)tls; return TlsGetValue(i); }
PAWAPP_API void   pawtls_setloc( void *tls, pawvu i, void *ud )
	{ (void)tls; return TlsSetValue( i, ud ); }
PAWAPP_API void   pawtls_delete( void *tls ) { (void)tls; }

Linux:

typedef struct _pawtls_entry { pawvu size; void *value; } pawtls_entry;
PAWTLS pawbuf pawtls = {0};
PAWAPP_API void*  pawtls_create( void ) { return &pawtls; }
PAWAPP_API pawvu  pawtls_newloc( void *tls, pawvu size )
{
	pawtls_entry *list = pawbuf_gettop(pawtls), *ent = NULL;
	pawvu i = 0, len = pawtls.len;
	(void)tls;
	if ( !size )
		return PAWTLS_NO_INDICES;
	if ( !list )
	{
		pawtls = pawbuf_newmax( sizeof(pawtls_entry), PAWCD_WIDTH );
		ent = pawbuf_gettop(pawtls);
		if ( !ent )
			return PAWTLS_NO_INDICES;
		ent->size = size;
		return 0;
	}
	for ( ; i < len; ++i )
	{
		ent = list + i;
		if ( ent->size )
			continue;
		ent->size;
		return i;
	}
	list = pawbuf_fitmax( &pawtls, len * 2 );
	if ( !list )
		return PAWTLS_NO_INDICES;
	ent = list + len;
	ent->size = size;
	pawtls.len++;
	return len;
}
PAWAPP_API void   pawtls_remloc( void *tls, pawvu i )
{
	pawtls_entry *ent = pawbuf_offset( pawtls, i );
	(void)tls;
	if ( !ent )
		return;
	ent->size = 0;
	ent->value = NULL;
}
PAWAPP_API void*  pawtls_getloc( void *tls, pawvu i )
{
	pawtls_entry *ent = pawbuf_offset(pawtls,i);
	return ent ? ent->value : NULL;
}
PAWAPP_API void   pawtls_setloc( void *tls, pawvu i, void *ud )
{
	pawtls_entry *ent = pawbuf_offset( pawtls, i );
	(void)tls;
	if ( ent )
		ent->value = ud;
}
PAWAPP_API void   pawtls_delete(void *tls)
	{ (void)tls; pawbuf_expire(&pawtls); }