154 lines
4.1 KiB
C
154 lines
4.1 KiB
C
#ifndef DFCONNECT_H
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#define DFCONNECT_H
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#define PINGPONG_VERSION 2
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#define SHM_KEY 123466
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#define SHM_HEADER 1024
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#define SHM_BODY 1024*1024
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#define SHM_SIZE SHM_HEADER+SHM_BODY
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// FIXME: add YIELD for linux, add single-core and multi-core compile targets for optimal speed
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#ifdef LINUX_BUILD
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// a full memory barrier! better be safe than sorry.
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#define full_barrier asm volatile("" ::: "memory"); __sync_synchronize();
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#define SCHED_YIELD
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#else
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// we need windows.h for Sleep()
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#define _WIN32_WINNT 0x0501 // needed for INPUT struct
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#define WINVER 0x0501 // OpenThread(), PSAPI, Toolhelp32
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#define SCHED_YIELD Sleep(0);
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// FIXME: detect MSVC here and use the right barrier magic
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#ifdef __MINGW32__
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#define full_barrier asm volatile("" ::: "memory");
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#else
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#include <intrin.h>
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#pragma intrinsic(_ReadWriteBarrier)
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#define full_barrier _ReadWriteBarrier();
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#endif
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#endif
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/*
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* read - parameters are address and length
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* write - parameters are address, length and the actual data to write
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* wait - sent to DF so that it waits for more commands
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* end - sent to DF for breaking out of the wait
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*/
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enum DF_SHM_ERRORSTATE
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{
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SHM_OK, // all OK
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SHM_CANT_GET_SHM, // getting the SHM ID failed for some reason
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SHM_CANT_ATTACH, // we can't attach the shm for some reason
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SHM_SECOND_DF // we are a second DF process, can't use SHM at all
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};
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enum DF_PINGPONG
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{
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DFPP_RUNNING = 0, // no command, normal server execution
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DFPP_VERSION, // protocol version query
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DFPP_RET_VERSION, // return the protocol version
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DFPP_PID, // query for the process ID
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DFPP_RET_PID, // return process ID
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// version 1 stuff below
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DFPP_READ, // cl -> sv, read some data
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DFPP_RET_DATA, // sv -> cl, returned data
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DFPP_READ_DWORD, // cl -> sv, read a dword
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DFPP_RET_DWORD, // sv -> cl, returned dword
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DFPP_READ_WORD, // cl -> sv, read a word
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DFPP_RET_WORD, // sv -> cl, returned word
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DFPP_READ_BYTE, // cl -> sv, read a byte
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DFPP_RET_BYTE, // sv -> cl, returned byte
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DFPP_SV_ERROR, // there was a server error
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DFPP_CL_ERROR, // there was a client error
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DFPP_WRITE,// client writes to server
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DFPP_WRITE_DWORD,// client writes a DWORD to server
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DFPP_WRITE_WORD,// client writes a WORD to server
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DFPP_WRITE_BYTE,// client writes a BYTE to server
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DFPP_SUSPEND, // client notifies server to wait for commands (server is stalled in busy wait)
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DFPP_SUSPENDED, // response to WAIT, server is stalled in busy wait
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// all strings capped at 1MB
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DFPP_READ_STL_STRING,// client requests contents of STL string at address
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DFPP_READ_C_STRING,// client requests contents of a C string at address, max length (0 means zero terminated)
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DFPP_RET_STRING, // sv -> cl length + string contents
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DFPP_WRITE_STL_STRING,// client wants to set STL string at address to something
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// vector elements > 1MB are not supported because they don't fit into the shared memory
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DFPP_READ_ENTIRE_VECTOR, // read an entire vector (parameters are address of vector object and size of items)
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DFPP_RET_VECTOR_BODY, // a part of a vector is returned - no. of elements returned, no. of elements total, elements
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NUM_DFPP
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};
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enum DF_ERROR
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{
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DFEE_INVALID_COMMAND,
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DFEE_BUFFER_OVERFLOW
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};
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typedef struct
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{
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volatile uint32_t pingpong; // = 0
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} shm_cmd;
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typedef struct
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{
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volatile uint32_t pingpong;
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uint32_t address;
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uint32_t length;
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} shm_read;
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typedef shm_read shm_write;
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typedef shm_read shm_bounce;
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typedef struct
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{
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volatile uint32_t pingpong;
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} shm_ret_data;
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typedef struct
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{
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volatile uint32_t pingpong;
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uint32_t address;
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} shm_read_small;
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typedef struct
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{
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volatile uint32_t pingpong;
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uint32_t address;
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uint32_t value;
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} shm_write_small;
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typedef struct
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{
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volatile uint32_t pingpong;
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uint32_t value;
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} shm_retval;
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typedef struct
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{
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volatile uint32_t pingpong;
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uint32_t length;
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} shm_retstr;
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void SHM_Act (void);
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bool isValidSHM();
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uint32_t getPID();
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#endif
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