ipc.h

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#pragma once
 
#include <stdint.h>
 
typedef void (*ipc_async_handler_t)(void* param, int return_value);
 
typedef struct {
    int command;
    int returned;
    int file_handle;
 
    union
    {
        struct {
            const char* path;
            int mode;
        } open;
 
        struct {
            void* address;
            int size;
        } read;
 
        struct {
            void* address;
            int size;
        } write;
 
        struct {
            int where;
            int whence;
        } seek;
 
        struct {
            int ioctl;
 
            void* address_in;
            int size_in;
 
            void* address_io;
            int size_io;
        } ioctl;
 
        struct {
            int ioctl;
            int argcin;
            int argcio;
            void* pairs;
        } ioctlv;
 
        uint32_t args[5];
    };
 
    // Used to prevent spurious responses, since this is cleared after the response is used.
    // Since not doing this could lead to stale stack usage.
    uint32_t magic;
 
    ipc_async_handler_t response_handler;
    void* params;
    
} ipc_message;

extern void ipc_initialize();

extern int ipc_request(ipc_message* message, ipc_async_handler_t handler, void* params);