minix3/lib/libsys/sys_vircopy.c

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2020-02-21 00:59:27 +05:30
#include "syslib.h"
int sys_vircopy(src_proc, src_vir,
dst_proc, dst_vir, bytes, flags)
endpoint_t src_proc; /* source process */
vir_bytes src_vir; /* source virtual address */
endpoint_t dst_proc; /* destination process */
vir_bytes dst_vir; /* destination virtual address */
phys_bytes bytes; /* how many bytes */
int flags; /* copy flags */
{
/* Transfer a block of data. The source and destination can each either be a
* process number or SELF (to indicate own process number).
*/
message copy_mess;
if (bytes == 0L) return(OK);
memset(&copy_mess, 0, sizeof(copy_mess));
copy_mess.m_lsys_krn_sys_copy.src_endpt = src_proc;
copy_mess.m_lsys_krn_sys_copy.src_addr = src_vir;
copy_mess.m_lsys_krn_sys_copy.dst_endpt = dst_proc;
copy_mess.m_lsys_krn_sys_copy.dst_addr = dst_vir;
copy_mess.m_lsys_krn_sys_copy.nr_bytes = bytes;
copy_mess.m_lsys_krn_sys_copy.flags = flags;
return(_kernel_call(SYS_VIRCOPY, &copy_mess));
}