systems_manager.h

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#pragma once
 
#include "defines.h"
#include "memory/allocators/linear_allocator.h"
 
struct frame_data;
 
typedef b8 (*PFN_system_initialize)(u64* memory_requirement, void* memory, void* config);
typedef void (*PFN_system_shutdown)(void* state);
typedef b8 (*PFN_system_update)(void* state, struct frame_data* p_frame_data);
typedef void (*PFN_system_render_prepare_frame)(void* state, const struct frame_data* p_frame_data);
 
typedef struct k_system {
    u64 state_size;
    void* state;
    PFN_system_initialize initialize;
    PFN_system_shutdown shutdown;
    PFN_system_update update;
    PFN_system_render_prepare_frame render_prepare_frame;
} k_system;
 
#define K_SYSTEM_TYPE_MAX_COUNT 512
 
typedef enum k_system_type {
    K_SYSTEM_TYPE_MEMORY = 0,
    K_SYSTEM_TYPE_CONSOLE,
    K_SYSTEM_TYPE_KVAR,
    K_SYSTEM_TYPE_EVENT,
    K_SYSTEM_TYPE_LOGGING,
    K_SYSTEM_TYPE_INPUT,
    K_SYSTEM_TYPE_PLATFORM,
    K_SYSTEM_TYPE_RESOURCE,
    K_SYSTEM_TYPE_SHADER,
    K_SYSTEM_TYPE_JOB,
    K_SYSTEM_TYPE_TEXTURE,
    K_SYSTEM_TYPE_FONT,
    K_SYSTEM_TYPE_CAMERA,
    K_SYSTEM_TYPE_RENDERER,
    K_SYSTEM_TYPE_XFORM,
    K_SYSTEM_TYPE_MATERIAL,
    K_SYSTEM_TYPE_GEOMETRY,
    K_SYSTEM_TYPE_LIGHT,
    K_SYSTEM_TYPE_AUDIO,
    K_SYSTEM_TYPE_TIMELINE,
 
    // NOTE: Anything between 127-254 is extension space.
    K_SYSTEM_TYPE_KNOWN_MAX = 127,
 
    // NOTE: Anything beyond this is in user space.
    K_SYSTEM_TYPE_EXT_MAX = 255,
 
    // The user-space max
    K_SYSTEM_TYPE_USER_MAX = K_SYSTEM_TYPE_MAX_COUNT,
    // The max, including all user-space types.
    K_SYSTEM_TYPE_MAX = K_SYSTEM_TYPE_USER_MAX
} k_system_type;
 
typedef struct systems_manager_state {
    linear_allocator systems_allocator;
    k_system systems[K_SYSTEM_TYPE_MAX_COUNT];
} systems_manager_state;
 
struct application_config;
 
b8 systems_manager_initialize(systems_manager_state* state, struct application_config* app_config);
b8 systems_manager_post_boot_initialize(systems_manager_state* state, struct application_config* app_config);
 
void systems_manager_shutdown(systems_manager_state* state);
 
b8 systems_manager_update(systems_manager_state* state, struct frame_data* p_frame_data);
 
void systems_manager_renderer_frame_prepare(systems_manager_state* state, const struct frame_data* p_frame_data);
 
KAPI b8 systems_manager_register(
    systems_manager_state* state,
    u16 type,
    PFN_system_initialize initialize,
    PFN_system_shutdown shutdown,
    PFN_system_update update,
    PFN_system_render_prepare_frame prepare_frame,
    void* config);
 
KAPI void* systems_manager_get_state(u16 type);