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Adding option to pass user data to allocator functions (#1765)

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Add an option to pass user data to the allocator functions. It is common to
do this so that the host embedder can pass a struct as user data and access
that struct from the allocator, which gives the host embedder the ability to
do things such as track allocation statistics within the allocator.

Compile with `cmake -DWASM_MEM_ALLOC_WITH_USER_DATA=1` to enable
the option, and the allocator functions provided by the host embedder should
be like below (an extra argument `data` is added):
void *malloc(void *data, uint32 size) { .. }
void *realloc(void *data, uint32 size) { .. }
void free(void *data, void *ptr) { .. }

Signed-off-by: Andrew Chambers <ncham@amazon.com>
This commit is contained in:
Andy
2022-11-30 08:19:18 +00:00
committed by GitHub
parent 216b2cb540
commit 3e8927a31b
6 changed files with 88 additions and 9 deletions
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3
build-scripts/config_common.cmake
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@ -311,3 +311,6 @@ endif ()
if (WAMR_BUILD_WASI_NN EQUAL 1)
message (" WASI-NN enabled")
endif ()
if (WAMR_BUILD_ALLOC_WITH_USER_DATA EQUAL 1)
add_definitions(-DWASM_MEM_ALLOC_WITH_USER_DATA=1)
endif()