kolibrios/programs/fs/Eolite/trunk/lib/IPC.H--
Kirill Lipatov (Leency) abb25d18e9 Eolite 0.97.1
git-svn-id: svn://kolibrios.org@938 a494cfbc-eb01-0410-851d-a64ba20cac60
2008-11-26 02:05:33 +00:00

187 lines
5.7 KiB
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//stuff for loading images via MeView via IPC by Nable. 2008
//Last changed 13.11.2008
inline fastcall void registerIPCbuffer(dword ECX, dword EDX)
//ecx - pointer to buffer, edx - buffer size
{
EAX=60;
EBX=1;
$int 0x40
}
inline fastcall void build_param_string(dword ESI, dword EDI)
//first parameter - pointer to filename string, second - pointer to
//the output area for commandline for MeView
proc_info _p_info;
{
_p_info.GetInfo(SelfInfo);
EBX = _p_info.ID;
EAX = 'NCPI'; //'IPCN' in reversed byte order
$STOSD
ECX = 8;
___NEW_SYMBOL_OF_PID:
$ROL EBX,4
EAX = EBX;
EAX &= 0xF;
EAX += '0';
$CMP AL,'9'
$JBE ___NEW_SYMBOL_OF_PID_PRINT
$ADD AL,7 //('A'-'0'-10)
___NEW_SYMBOL_OF_PID_PRINT:
$STOSB
$LOOP ___NEW_SYMBOL_OF_PID
___NEW_SYMBOL_OF_PATH_COPY:
$LODSB
$STOSB
$OR AL,AL
$JNE ___NEW_SYMBOL_OF_PATH_COPY
}
char _Path2MeView[]="/sys/mv";
inline int RunMV(char* parameters)
f70 _run_struct;
{
_run_struct.func = 7;
_run_struct.param1 = 0;
_run_struct.param2 = parameters;
_run_struct.param3 =
_run_struct.param4 =
_run_struct.rezerv = 0;
_run_struct.name = #_Path2MeView;
EAX=70;
EBX=#_run_struct;
$int 0x40
//EAX (return code) will contain positive PID of new process or negative error code.
}
int loadimage_viaIPC(char* file_name_to_load, int initial_values)
//really it must be IMAGE_INFO* initial_values, but compiler rejected
//this, so I had to use 'int initial_values'
char param_string[255];
unsigned int _FrameCountTemp;
int temp0; //scratch variable
int came_size; //sizeof data that came. It's used to shrink unneeded IPC data
//added by Nable 13.11.2008 3.36am (begin)
int MVsPID; //no comments
int MVsSlot; //no comments
proc_info _p_info; //this structure will be used to test if MV is alive
//added by Nable 13.11.2008 3.36am (end)
{
int pIPCbuffer = malloc(64); //IPC buffer for the first message can be
//rather small but >= 8+8+24
/*Here you can add error checking code, i.e. if(!pIPCbuffer)
{ ErrorExit("OUT OF MEMORY!"); }; */
registerIPCbuffer(pIPCbuffer,64);
DSDWORD[pIPCbuffer+4]=8; //at +4 in IPC buffer is a relative pointer to free place
build_param_string(file_name_to_load, #param_string);
DSDWORD[pIPCbuffer]=0; //unlock the buffer
SetEventMask(01000000b); // 1 << (evIPC-1)
//13.11.2008 3.45am Nable's fixes (begin1)
MVsPID = RunMV(#param_string); //you can use here your function but don't forget
//about parameters (param_string).
MVsSlot = PIDtoSlot(MVsPID);
WHILE(!(WaitEventTimeout(100))){
//we have only one event - evIPC so return value may be 0 or evIPC but if received 0 it can mean
//either MV terminated silently or it just hasn't done the work and we should wait. Test for it
_p_info.GetInfo(MVsSlot);
IF((_p_info.status_slot > 2)||(_p_info.ID != MVsPID)) return 0;
}
//13.11.2008 4.26am Nable's fixes ( end1)
//else we got the message. Process it.
DSDWORD[pIPCbuffer] |= -1; //lock the buffer
//the first dword of the message is frame count
_FrameCountTemp = DSDWORD[pIPCbuffer+16]; //note that data of the first
//message is located at offset 16 in IPC buffer;
IF(_FrameCountTemp <= 1) //see docs
{
ESI = pIPCbuffer+16+12;
EDI = initial_values; //offset of CurrentImage structure
//Left and top corner's coords (not used in many cases but who knows?)
$MOVSD
//Width and height
$MOVSD
//bpp
$LODSD
$movzx eax,ax
CurrentImage.BitsPerPixel = EAX;
}
//see docs
came_size = DSDWORD[pIPCbuffer+24]; //amount of useful data
temp0 = came_size + 4096; //+4096 - some reserve
realloc(temp0+4096, pIPCbuffer); //+4096 - some reserve
registerIPCbuffer(pIPCbuffer, temp0); //re-register IPC buffer with a new size
DSDWORD[pIPCbuffer+4]=8; //delete first message, at +4 in IPC buffer is a
//relative pointer to free place
DSDWORD[pIPCbuffer]=0; //unlock the buffer to receive second msg
//13.11.2008 4.26am Nable's fixes ( begin2)
WHILE(!(WaitEventTimeout(100))){
//we have only one event - evIPC so return value may be 0 or evIPC but if received 0 it can mean
//either MV terminated silently or it just hasn't done the work and we should wait. Test for it
_p_info.GetInfo(MVsSlot);
IF((_p_info.status_slot > 2)||(_p_info.ID != MVsPID)) return 0;
}
//13.11.2008 4.26am Nable's fixes ( end2)
//if we are here, then we received the second message. if FrameCount==1 then
//it's a pure image data (if BitsPerPixel==15, 16, 24 or 32) or
//(dword)sizeof(palette[]) then palette[] and then the image.
//Parse it as you like, here's my way:
registerIPCbuffer(pIPCbuffer, 0); // there are no function 'unregister
//IPC buffer' in Kolibri - so I have to use 'dark power'
//shrink unneeded IPC data
ECX = came_size;
$SHR ECX,2
ECX++; //ECX = number of useful dwords
EDI = pIPCbuffer;
ESI = EDI + 16;
$CLD
$REP $MOVSD
//now we must interpret second message
EDI = initial_values;
IF(_FrameCountTemp <= 1)
{
IF(DSDWORD[EDI+24] > 8) //CurrentImage.BitsPerPixel
{
DSDWORD[EDI+20] = 0; //CurrentImage.pPalette=0
DSDWORD[EDI+16] = pIPCbuffer; //CurrentImage.StartOfImage=pIPCbuffer
}
ELSE
{
EAX = pIPCbuffer + 4;
DSDWORD[EDI+20] = EAX; //CurrentImage.pPalette=EAX
EAX += DSDWORD[EAX-4];
DSDWORD[EDI+16] = EAX; //CurrentImage.StartOfImage = EAX;
};
}
ELSE
{
GetNthImageInfo(pIPCbuffer,EDI,0);
};
EBX = _FrameCountTemp;
return pIPCbuffer;
}