fix(vcl): param size #222
fix(vcl): param size #222
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WalkthroughThe changes include the introduction of a new V programming module that integrates OpenCL for executing a kernel with various parameter types. This module manages OpenCL device interactions, including device retrieval, resource management, and kernel execution. Additionally, modifications to the Changes
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Actionable comments posted: 0
🧹 Outside diff range and nitpick comments (1)
vcl/kernel.c.v (1)
110-140: Consider adding documentation for the ArgumentType interface behaviorWhile the fix is correct, it would be helpful to document this behavior in the
ArgumentTypeinterface definition to prevent future confusion.Add documentation above the interface:
+// ArgumentType is an interface for OpenCL kernel arguments +// Note: When implementing this interface, be careful with sizeof() +// as it will return the size of the pointer rather than the actual type +// unless properly dereferenced pub interface ArgumentType {}
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📒 Files selected for processing (2)
examples/vcl_opencl_kernel_params/main.v(1 hunks)vcl/kernel.c.v(1 hunks)
🔇 Additional comments (3)
examples/vcl_opencl_kernel_params/main.v (2)
7-19: LGTM: Kernel implementation correctly tests parameter sizes
The OpenCL kernel is well-structured to test the size of different parameter types by storing their sizes in a buffer. This effectively demonstrates the fix for the parameter size issue.
54-55: Verify parameter sizes match V language specifications
The assertion validates that parameter sizes match expected values:
- 1 byte: i8/u8 (char/uchar)
- 2 bytes: i16/u16 (short/ushort)
- 4 bytes: i32/u32/f32 (int/uint/float)
- 8 bytes: i64/u64/f64 (long/ulong/double)
This aligns with standard type sizes and confirms the fix works correctly.
Also applies to: 65-65
✅ Verification successful
Let me gather more information about the actual type sizes being used in the example.
Parameter sizes correctly match OpenCL and V language specifications
The verification confirms the parameter sizes are correct:
- The kernel code explicitly checks sizes using
sizeof() - The assertion
assert next_data == [1, 1, 2, 2, 4, 4, 8, 8, 4, 8]validates:- i8/u8 (char/uchar): 1 byte
- i16/u16 (short/ushort): 2 bytes
- i32/u32/f32 (int/uint/float): 4 bytes
- i64/u64/f64 (long/ulong/double): 8 bytes
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Verify type sizes in V language specs
rg -A 1 "sizeof\(" .
Length of output: 4145
Script:
#!/bin/bash
# Check the kernel code and type declarations
cat examples/vcl_opencl_kernel_params/main.v
Length of output: 1804
vcl/kernel.c.v (1)
110-140: Fix: Correctly handle parameter sizes by dereferencing arguments
The changes properly fix the parameter size issue by:
- Using
*argto dereference the argument instead of taking its address - Using
sizeof(*arg)to get the actual type size instead of pointer size - Consistently applying this pattern across all numeric types
This resolves the original issue where casting to ArgumentType interface was causing sizeof() to return pointer size.
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Match statement can now be simplified with vlang/v#23068 |
The cast to interface
ArgumentTypecauses the parameter to become a reference, so currentlysizeof()is getting the sizeof the pointer. It works with dereferencing.I also added an example/test.
The behavior can be reproduced with the following code.
Summary by CodeRabbit
New Features
Bug Fixes
set_argmethod for improved type safety and clarity.Documentation