kronos_compute/implementation/
buffer.rs

1//! REAL Kronos buffer implementation - NO ICD forwarding!
2
3use crate::sys::*;
4use crate::core::*;
5use crate::ffi::*;
6use std::ptr;
7use std::sync::atomic::{AtomicU64, Ordering};
8use std::sync::Mutex;
9use std::collections::HashMap;
10
11// Buffer handle counter
12static BUFFER_COUNTER: AtomicU64 = AtomicU64::new(1);
13
14// Registry of active buffers
15lazy_static::lazy_static! {
16    static ref BUFFERS: Mutex<HashMap<u64, BufferData>> = Mutex::new(HashMap::new());
17}
18
19struct BufferData {
20    device: VkDevice,
21    size: VkDeviceSize,
22    usage: VkBufferUsageFlags,
23    sharing_mode: VkSharingMode,
24    memory: Option<VkDeviceMemory>,
25    memory_offset: VkDeviceSize,
26}
27
28/// Create a buffer - REAL implementation
29#[no_mangle]
30pub unsafe extern "C" fn vkCreateBuffer(
31    device: VkDevice,
32    pCreateInfo: *const VkBufferCreateInfo,
33    _pAllocator: *const VkAllocationCallbacks,
34    pBuffer: *mut VkBuffer,
35) -> VkResult {
36    log::info!("=== KRONOS vkCreateBuffer called (Pure Rust) ===");
37    
38    if device.is_null() || pCreateInfo.is_null() || pBuffer.is_null() {
39        return VkResult::ErrorInitializationFailed;
40    }
41    
42    let create_info = &*pCreateInfo;
43    
44    // Validate buffer size
45    if create_info.size == 0 {
46        return VkResult::ErrorInitializationFailed;
47    }
48    
49    // We only support compute/transfer usage
50    let allowed_usage = VkBufferUsageFlags::STORAGE_BUFFER 
51        | VkBufferUsageFlags::TRANSFER_SRC 
52        | VkBufferUsageFlags::TRANSFER_DST
53        | VkBufferUsageFlags::UNIFORM_BUFFER;
54        
55    if !allowed_usage.contains(create_info.usage) {
56        log::warn!("Buffer usage {:?} contains unsupported flags", create_info.usage);
57    }
58    
59    // Create buffer handle
60    let handle = BUFFER_COUNTER.fetch_add(1, Ordering::SeqCst);
61    
62    // Store buffer data
63    let buffer_data = BufferData {
64        device,
65        size: create_info.size,
66        usage: create_info.usage,
67        sharing_mode: create_info.sharingMode,
68        memory: None,
69        memory_offset: 0,
70    };
71    
72    BUFFERS.lock().unwrap().insert(handle, buffer_data);
73    
74    *pBuffer = VkBuffer::from_raw(handle);
75    
76    log::info!("Created buffer {:?} with size {}", handle, create_info.size);
77    
78    VkResult::Success
79}
80
81/// Destroy a buffer
82#[no_mangle]
83pub unsafe extern "C" fn vkDestroyBuffer(
84    device: VkDevice,
85    buffer: VkBuffer,
86    _pAllocator: *const VkAllocationCallbacks,
87) {
88    if device.is_null() || buffer.is_null() {
89        return;
90    }
91    
92    let handle = buffer.as_raw();
93    BUFFERS.lock().unwrap().remove(&handle);
94    
95    log::info!("Destroyed buffer {:?}", handle);
96}
97
98/// Get buffer memory requirements
99#[no_mangle]
100pub unsafe extern "C" fn vkGetBufferMemoryRequirements(
101    device: VkDevice,
102    buffer: VkBuffer,
103    pMemoryRequirements: *mut VkMemoryRequirements,
104) {
105    if device.is_null() || buffer.is_null() || pMemoryRequirements.is_null() {
106        return;
107    }
108    
109    let handle = buffer.as_raw();
110    if let Some(buffer_data) = BUFFERS.lock().unwrap().get(&handle) {
111        let requirements = &mut *pMemoryRequirements;
112        
113        // Simple alignment requirement
114        requirements.alignment = 256; // 256 byte alignment
115        requirements.size = (buffer_data.size + 255) & !255; // Round up to alignment
116        
117        // We support all memory types for compute
118        requirements.memoryTypeBits = 0xFFFFFFFF;
119    }
120}
121
122/// Bind memory to buffer
123#[no_mangle]
124pub unsafe extern "C" fn vkBindBufferMemory(
125    device: VkDevice,
126    buffer: VkBuffer,
127    memory: VkDeviceMemory,
128    memoryOffset: VkDeviceSize,
129) -> VkResult {
130    if device.is_null() || buffer.is_null() || memory.is_null() {
131        return VkResult::ErrorInitializationFailed;
132    }
133    
134    let handle = buffer.as_raw();
135    if let Some(buffer_data) = BUFFERS.lock().unwrap().get_mut(&handle) {
136        buffer_data.memory = Some(memory);
137        buffer_data.memory_offset = memoryOffset;
138        
139        log::info!("Bound memory {:?} to buffer {:?} at offset {}", 
140                   memory.as_raw(), handle, memoryOffset);
141        
142        VkResult::Success
143    } else {
144        VkResult::ErrorDeviceLost
145    }
146}
kronos_compute/implementation/buffer.rs

kronos_compute/implementation/
buffer.rs
