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/********************************************************/
/* ntapi: Native API core library */
/* Copyright (C) 2013--2017 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
/********************************************************/
#include <psxtypes/psxtypes.h>
#include <ntapi/nt_file.h>
#include <ntapi/nt_string.h>
#include <ntapi/nt_atomic.h>
#include <ntapi/nt_port.h>
#include <ntapi/nt_ipc.h>
#include <ntapi/nt_msq.h>
#include <ntapi/ntapi.h>
#include "ntapi_impl.h"
static int32_t __msq_recv_return(
void * mapaddr,
intptr_t volatile * hlock,
int32_t status)
{
if (hlock)
at_store(hlock,0);
if (mapaddr)
__ntapi->zw_unmap_view_of_section(
NT_CURRENT_PROCESS_HANDLE,
mapaddr);
return status;
}
int32_t __stdcall __ntapi_msq_recv(
__in nt_msq_info * msq,
__in void * hevent __optional,
__in nt_io_apc_routine * apc_routine __optional,
__in void * apc_context __optional,
__out void * buffer,
__in size_t len,
__in intptr_t rank,
__in uint32_t options,
__out nt_io_status_block * iosb)
{
int32_t status;
void * mapaddr;
void * hsection;
void * secaddr;
size_t secsize;
nt_msq_info_msg msg;
intptr_t volatile * hlock;
/* validate */
if (!iosb)
return NT_STATUS_INVALID_PARAMETER;
else if (!len)
return NT_STATUS_INVALID_PARAMETER;
/* section */
if (msq->section_addr) {
hsection = msq->section;
secaddr = msq->section_addr;
secsize = msq->section_size;
mapaddr = 0;
} else if ((status = __ntapi->ipc_init_section_by_port(
msq->hport,&hsection,
&secaddr,&secsize))) {
return status;
} else {
mapaddr = secaddr;
}
/* len */
if (len > secsize)
len = secsize;
/* lock */
hlock = &(__ntapi_internals()->hlock);
while (at_locked_cas(hlock,0,1))
__ntapi->zw_delay_execution(
NT_SYNC_NON_ALERTABLE,
&(nt_timeout){{0,0}});
/* msg */
__ntapi->tt_aligned_block_memset(
&msg,0,sizeof(msg));
msg.header.msg_type = NT_LPC_NEW_MESSAGE;
msg.header.data_size = sizeof(msg.data);
msg.header.msg_size = sizeof(msg);
msg.data.ttyinfo.opcode = NT_TTY_MSQ_RECV;
msg.data.msqinfo.msqkey = msq->msqkey;
msg.data.msqinfo.msqid = msq->msqid;
msg.data.msqinfo.msqrpid = msq->msqrpid;
msg.data.msqinfo.msqrank = rank;
msg.data.msqinfo.section_addr = secaddr;
msg.data.msqinfo.section_size = len;
msg.data.msqinfo.ntoptions = options;
msg.data.msqinfo.hevent = hevent;
msg.data.msqinfo.apc_routine = apc_routine;
msg.data.msqinfo.apc_context = apc_context;
msg.data.msqinfo.riosb = iosb;
if ((status = __ntapi->zw_request_wait_reply_port(msq->hport,&msg,&msg)))
return __msq_recv_return(mapaddr,hlock,status);
else if (msg.data.ttyinfo.status)
return __msq_recv_return(mapaddr,hlock,msg.data.ttyinfo.status);
/* msq data section to buffer */
__ntapi->tt_generic_memcpy(
buffer,secaddr,
msg.data.msqinfo.ntiosb.info);
/* all done */
iosb->status = msg.data.msqinfo.ntiosb.status;
iosb->info = msg.data.msqinfo.ntiosb.info;
return __msq_recv_return(mapaddr,hlock,NT_STATUS_SUCCESS);
}
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