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Upgrade to WasmEdge 0.16.0

Due to the WasmEdge C API breaking changes, this document shows the guideline for programming with WasmEdge C API to upgrade from the 0.15.1 to the 0.16.0 version.

Concepts​

  1. Introduced new APIs for quickly assigning the WASM standards.

    Developers can use the WasmEdge_ConfigureSetWASMStandard() to quickly configure the WASM standard in the Configure context.

Set the WASM standards and proposals​

With the WasmEdge_ConfigureSetWASMStandard() API, the following WASM standards can be used for quickly configuration:

enum WasmEdge_Standard {
  WasmEdge_Standard_WASM_1, // WASM 1.0
  WasmEdge_Standard_WASM_2, // WASM 2.0
  WasmEdge_Standard_WASM_3, // WASM 3.0, default
}

The WASM 1.0 contains the basic WASM spec and the following proposal:

  • Import/Export of mutable globals

The WASM 2.0 contains the WASM 1.0 and the following proposals:

  • Non-trapping float-to-int conversions
  • Sign-extension operators
  • Multi-value returns
  • Bulk memory operations
  • Reference types
  • Fixed-width SIMD

The WASM 3.0 contains the WASM 2.0 and the following proposals:

  • Tail-call
  • Extended-const
  • Typed-function references
  • GC
  • Multiple memories
  • Relaxed SIMD
  • Exception handling (interpreter only)
  • Memory64 (not supported in WasmEdge yet)

After assigning the WASM standard, the corresponding WASM proposals will be enabled or disabled, and all of the proposal settings will be overwritten.

/* By default, the standard is WASM 3.0. */
WasmEdge_ConfigureContext *ConfCxt = WasmEdge_ConfigureCreate();

/* The `IsMultiRet` will be `TRUE`. */
bool IsMultiRet =
    WasmEdge_ConfigureHasProposal(ConfCxt, WasmEdge_Proposal_MultiValue);

/* Remove the Multi-value returns proposal, which is in WASM 2.0. */
WasmEdge_ConfigureRemoveProposal(ConfCxt, WasmEdge_Proposal_MultiValue);

/* The `IsMultiRet` will be `FALSE`. */
IsMultiRet =
    WasmEdge_ConfigureHasProposal(ConfCxt, WasmEdge_Proposal_MultiValue);

/* Set the standard to WASM 2.0. All proposal settings is reset. */
WasmEdge_ConfigureSetWASMStandard(ConfCxt, WasmEdge_Standard_WASM_2);

/* The `IsMultiRet` will be `TRUE`. */
IsMultiRet =
    WasmEdge_ConfigureHasProposal(ConfCxt, WasmEdge_Proposal_MultiValue);

/* Set the standard to WASM 1.0. All proposal settings is reset. */
WasmEdge_ConfigureSetWASMStandard(ConfCxt, WasmEdge_Standard_WASM_1);

/* The `IsMultiRet` will be `FALSE`. */
IsMultiRet =
    WasmEdge_ConfigureHasProposal(ConfCxt, WasmEdge_Proposal_MultiValue);

WasmEdge_ConfigureDelete(ConfCxt);