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@Synchronized
private fun findLibraryName(componentName: String): String {
val libOverride = System.getProperty("uniffi.component.$componentName.libraryOverride")
if (libOverride != null) {
return libOverride
}
return "{{ config.cdylib_name() }}"
}
private inline fun <reified Lib : Library> loadIndirect(
componentName: String
): Lib {
return Native.load<Lib>(findLibraryName(componentName), Lib::class.java)
}
// Define FFI callback types
{%- for def in ci.ffi_definitions() %}
{%- match def %}
{%- when FfiDefinition::CallbackFunction(callback) %}
internal interface {{ callback.name()|ffi_callback_name }} : com.sun.jna.Callback {
fun callback(
{%- for arg in callback.arguments() -%}
{{ arg.name().borrow()|var_name }}: {{ arg.type_().borrow()|ffi_type_name_by_value }},
{%- endfor -%}
{%- if callback.has_rust_call_status_arg() -%}
uniffiCallStatus: UniffiRustCallStatus,
{%- endif -%}
)
{%- match callback.return_type() %}
{%- when Some(return_type) %}: {{ return_type|ffi_type_name_by_value }}
{%- when None %}
{%- endmatch %}
}
{%- when FfiDefinition::Struct(ffi_struct) %}
@Structure.FieldOrder({% for field in ffi_struct.fields() %}"{{ field.name()|var_name_raw }}"{% if !loop.last %}, {% endif %}{% endfor %})
internal open class {{ ffi_struct.name()|ffi_struct_name }}(
{%- for field in ffi_struct.fields() %}
@JvmField internal var {{ field.name()|var_name }}: {{ field.type_().borrow()|ffi_type_name_for_ffi_struct }} = {{ field.type_()|ffi_default_value }},
{%- endfor %}
) : Structure() {
class UniffiByValue(
{%- for field in ffi_struct.fields() %}
{{ field.name()|var_name }}: {{ field.type_().borrow()|ffi_type_name_for_ffi_struct }} = {{ field.type_()|ffi_default_value }},
{%- endfor %}
): {{ ffi_struct.name()|ffi_struct_name }}({%- for field in ffi_struct.fields() %}{{ field.name()|var_name }}, {%- endfor %}), Structure.ByValue
internal fun uniffiSetValue(other: {{ ffi_struct.name()|ffi_struct_name }}) {
{%- for field in ffi_struct.fields() %}
{{ field.name()|var_name }} = other.{{ field.name()|var_name }}
{%- endfor %}
}
}
{%- when FfiDefinition::Function(_) %}
{# functions are handled below #}
{%- endmatch %}
{%- endfor %}
// A JNA Library to expose the extern-C FFI definitions.
// This is an implementation detail which will be called internally by the public API.
internal interface UniffiLib : Library {
companion object {
internal val INSTANCE: UniffiLib by lazy {
loadIndirect<UniffiLib>(componentName = "{{ ci.namespace() }}")
.also { lib: UniffiLib ->
uniffiCheckContractApiVersion(lib)
uniffiCheckApiChecksums(lib)
{% for fn in self.initialization_fns() -%}
{{ fn }}(lib)
{% endfor -%}
}
}
{% if ci.contains_object_types() %}
// The Cleaner for the whole library
internal val CLEANER: UniffiCleaner by lazy {
UniffiCleaner.create()
}
{%- endif %}
}
{% for func in ci.iter_ffi_function_definitions() -%}
fun {{ func.name() }}(
{%- call kt::arg_list_ffi_decl(func) %}
): {% match func.return_type() %}{% when Some with (return_type) %}{{ return_type.borrow()|ffi_type_name_by_value }}{% when None %}Unit{% endmatch %}
{% endfor %}
}
private fun uniffiCheckContractApiVersion(lib: UniffiLib) {
// Get the bindings contract version from our ComponentInterface
val bindings_contract_version = {{ ci.uniffi_contract_version() }}
// Get the scaffolding contract version by calling the into the dylib
val scaffolding_contract_version = lib.{{ ci.ffi_uniffi_contract_version().name() }}()
if (bindings_contract_version != scaffolding_contract_version) {
throw RuntimeException("UniFFI contract version mismatch: try cleaning and rebuilding your project")
}
}
@Suppress("UNUSED_PARAMETER")
private fun uniffiCheckApiChecksums(lib: UniffiLib) {
{%- for (name, expected_checksum) in ci.iter_checksums() %}
if (lib.{{ name }}() != {{ expected_checksum }}.toShort()) {
throw RuntimeException("UniFFI API checksum mismatch: try cleaning and rebuilding your project")
}
{%- endfor %}
}
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