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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_sem.h>
#include <ntapi/ntapi.h>
#include "ntapi_impl.h"
static int32_t __sem_query_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_sem_query(
__in nt_sem_info * sem,
__out nt_io_status_block * iosb,
__out void * sem_info,
__in uint32_t sem_info_length,
__in int32_t sem_ipc_cmd)
{
int32_t status;
void * mapaddr;
void * hsection;
void * secaddr;
size_t secsize;
nt_sem_info_msg msg;
intptr_t volatile * hlock;
/* validate */
if (!iosb)
return NT_STATUS_INVALID_PARAMETER;
else if (!sem_info)
return NT_STATUS_INVALID_PARAMETER;
else if (!sem_info_length)
return NT_STATUS_INVALID_PARAMETER;
else if (sem_ipc_cmd != NT_SEM_CMD_GETALL)
if (sem_info_length != sizeof(nt_sem_info))
return NT_STATUS_INFO_LENGTH_MISMATCH;
/* init */
hlock = 0;
/* section */
hsection = 0;
secaddr = 0;
secsize = 0;
if (sem_ipc_cmd == NT_SEM_CMD_GETALL) {
if (sem->section_addr) {
hsection = sem->section;
secaddr = sem->section_addr;
secsize = sem->section_size;
mapaddr = 0;
} else if ((status = __ntapi->ipc_init_section_by_port(
sem->hport,&hsection,
&secaddr,&secsize))) {
return status;
} else {
mapaddr = secaddr;
}
/* 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_SEM_QUERY;
msg.data.seminfo.semcmd = sem_ipc_cmd;
msg.data.seminfo.semkey = sem->semkey;
msg.data.seminfo.semid = sem->semid;
msg.data.seminfo.semnum = sem->semnum;
msg.data.seminfo.section_addr = secaddr;
msg.data.seminfo.section_size = secsize;
if ((status = __ntapi->zw_request_wait_reply_port(sem->hport,&msg,&msg)))
return __sem_query_return(mapaddr,hlock,status);
else if (msg.data.ttyinfo.status)
return __sem_query_return(mapaddr,hlock,msg.data.ttyinfo.status);
/* reply */
if (sem_ipc_cmd == NT_SEM_CMD_GETALL) {
if (msg.data.seminfo.section_size > sem_info_length)
return __sem_query_return(
mapaddr,hlock,
NT_STATUS_BUFFER_TOO_SMALL);
__ntapi->tt_generic_memcpy(
sem_info,secaddr,
msg.data.seminfo.section_size);
at_store(hlock,0);
iosb->status = NT_STATUS_SUCCESS;
iosb->info = msg.data.seminfo.section_size;
if (mapaddr)
__ntapi->zw_unmap_view_of_section(
NT_CURRENT_PROCESS_HANDLE,
mapaddr);
} else {
if (msg.header.data_size != sizeof(msg.data))
return NT_STATUS_UNEXPECTED_IO_ERROR;
__ntapi->tt_generic_memcpy(
sem_info,
&msg.data.seminfo,
sizeof(msg.data.seminfo));
iosb->status = NT_STATUS_SUCCESS;
iosb->info = sizeof(msg.data.seminfo);
}
return NT_STATUS_SUCCESS;
}
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