mirror of
https://github.com/fluencelabs/wasmer
synced 2024-12-15 15:15:40 +00:00
24 lines
1.0 KiB
Rust
24 lines
1.0 KiB
Rust
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use crate::webassembly::{LinearMemory, Instance};
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pub fn align_memory(ptr: u32) -> u32 {
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(ptr + 15) & !15
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}
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// pub fn static_alloc(size: u32, instance: &mut Instance) -> u32 {
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// let static_top = instance.emscripten_data.static_top;
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// let total_memory = instance.memories[0].maximum.unwrap_or(LinearMemory::DEFAULT_HEAP_SIZE as u32);
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// instance.emscripten_data.static_top = (static_top + size + 15) & 4294967280;
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// assert!(static_top < total_memory, "not enough memory for static allocation - increase total_memory!");
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// static_top
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// }
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pub fn static_alloc(size: u32, static_top: &mut u32, memory: &LinearMemory) -> u32 {
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let old_static_top = *static_top;
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let total_memory = memory.maximum_size() * LinearMemory::PAGE_SIZE;
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// NOTE: The `4294967280` is a u32 conversion of -16 as gotten from emscripten.
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*static_top = (*static_top + size + 15) & 4294967280;
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assert!(*static_top < total_memory, "not enough memory for static allocation - increase total_memory!");
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old_static_top
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}
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