MEM_FENCE(3clc)

💅 MEM_FENCE 💅

ok so bestie, welcome to the OpenCL Manual page for mem_fence — yes it's a 3clc page, yes it's iconic, let's get into it 🎀

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✨ NAME ✨

mem_fence — orders loads and stores of a work-item executing a kernel. fr fr that's the whole job description. 👑

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🌸 SYNOPSIS 🌸

void mem_fence(cl_mem_fence_flags flags);

that's it. one function, one argument, zero drama. lowkey obsessed. 🫶

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🦋 DESCRIPTION 🦋

okay so here's the tea: mem_fence orders the loads and stores of a work-item executing a kernel. and what does that actually mean? it means that the loads and stores that come before the mem_fence will be committed to memory before any loads and stores that come after the mem_fence. like, the fence is the bouncer at the club and nobody cuts the line. periodt. 💅

the flags argument is the one you get to choose, and it specifies the memory address space. you can set it to a combination of these literal values:

• CLK_LOCAL_MEM_FENCE
• CLK_GLOBAL_MEM_FENCE

combo move = valid, bestie. the more you know ✨

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📜 SPECIFICATION 📜

the OpenCL Specification[1] — yeah the footnote is real, it's down at the bottom, we'll get there. 🌈

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👀 SEE ALSO 👀

• explicitMemoryFenceFunctions(3clc) — go read that one too, it's giving family reunion 🫶

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💖 AUTHORS 💖

The Khronos Group. absolute main characters, no cap. 👑

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⭐ COPYRIGHT ⭐

Copyright © 2007-2011 The Khronos Group Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and/or associated documentation files (the "Materials"), to deal in the Materials without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Materials, and to permit persons to whom the Materials are furnished to do so, subject to the condition that this copyright notice and permission notice shall be included in all copies or substantial portions of the Materials.

(translation: free to use, be normal about it, keep the notice. 🎀)

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📝 NOTES 📝

1. OpenCL Specification — page 275, section 6.12.9 - Explicit Memory Fence Functions

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ngl this is the whole page, no hidden bonus levels. if you skipped the DESCRIPTION: fence = order matters, before goes first, flags picks your memory space. slay. 💜

and that's a wrap, bestie — brought to you by The Khronos Group, dated 01/14/2021, from the MEM_FENCE(3clc) page of the OpenCL manual. mwah 💋