src/stdsimd/coresimd/wasm32.rs

   1 extern "C" {
   2     #[link_name = "llvm.wasm.grow.memory.i32"]
   3     fn llvm_grow_memory(pages: i32) -> i32;
   4     #[link_name = "llvm.wasm.current.memory.i32"]
   5     fn llvm_current_memory() -> i32;
   6 }
   7
   8 /// Corresponding intrinsic to wasm's [`current_memory` instruction][instr]
   9 ///
  10 /// This function, when called, will return the current memory size in units of
  11 /// pages.
  12 ///
  13 /// [instr]: https://github.com/WebAssembly/design/blob/master/Semantics.md#resizing
  14 #[inline]
  15 pub unsafe fn current_memory() -> i32 {
  16     llvm_current_memory()
  17 }
  18
  19 /// Corresponding intrinsic to wasm's [`grow_memory` instruction][instr]
  20 ///
  21 /// This function, when called, will attempt to grow the default linear memory
  22 /// by the specified number of pages. If memory is successfully grown then the
  23 /// previous size of memory, in pages, is returned. If memory cannot be grown
  24 /// then -1 is returned.
  25 ///
  26 /// [instr]: https://github.com/WebAssembly/design/blob/master/Semantics.md#resizing
  27 #[inline]
  28 pub unsafe fn grow_memory(delta: i32) -> i32 {
  29     llvm_grow_memory(delta)
  30 }