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[njs] Passing to native function additional magic argument.

Dmitry Volyntsev
November 08, 2019 08:32AM
details: https://hg.nginx.org/njs/rev/6df48738a043
branches:
changeset: 1225:6df48738a043
user: Dmitry Volyntsev <xeioex@nginx.com>
date: Fri Nov 08 16:29:24 2019 +0300
description:
Passing to native function additional magic argument.

This allows to make more generic function handlers.

diffstat:

src/njs_function.c | 17 +++++++++++------
src/njs_value.h | 17 +++++++++++++----
2 files changed, 24 insertions(+), 10 deletions(-)

diffs (123 lines):

diff -r 4d33ea223de0 -r 6df48738a043 src/njs_function.c
--- a/src/njs_function.c Tue Nov 05 20:49:57 2019 +0300
+++ b/src/njs_function.c Fri Nov 08 16:29:24 2019 +0300
@@ -591,8 +591,7 @@ njs_function_native_call(njs_vm_t *vm)
function = native->function;

ret = function->u.native(vm, native->arguments, native->nargs,
- frame->retval);
-
+ function->magic);
if (njs_slow_path(ret == NJS_ERROR)) {
return ret;
}
@@ -919,9 +918,10 @@ njs_function_instance_length(njs_vm_t *v

static njs_int_t
njs_function_prototype_call(njs_vm_t *vm, njs_value_t *args, njs_uint_t nargs,
- njs_index_t retval)
+ njs_index_t unused)
{
njs_int_t ret;
+ njs_frame_t *frame;
njs_function_t *function;
const njs_value_t *this;

@@ -939,6 +939,8 @@ njs_function_prototype_call(njs_vm_t *vm
nargs = 0;
}

+ frame = (njs_frame_t *) vm->top_frame;
+
function = njs_function(&args[0]);

/* Skip the "call" method frame. */
@@ -949,7 +951,7 @@ njs_function_prototype_call(njs_vm_t *vm
return ret;
}

- ret = njs_function_frame_invoke(vm, retval);
+ ret = njs_function_frame_invoke(vm, frame->retval);
if (njs_slow_path(ret != NJS_OK)) {
return ret;
}
@@ -960,10 +962,11 @@ njs_function_prototype_call(njs_vm_t *vm

static njs_int_t
njs_function_prototype_apply(njs_vm_t *vm, njs_value_t *args, njs_uint_t nargs,
- njs_index_t retval)
+ njs_index_t unused)
{
uint32_t i, length;
njs_int_t ret;
+ njs_frame_t *frame;
njs_value_t name, *this, *arr_like;
njs_array_t *arr;
njs_function_t *func;
@@ -1021,12 +1024,14 @@ activate:
/* Skip the "apply" method frame. */
vm->top_frame->skip = 1;

+ frame = (njs_frame_t *) vm->top_frame;
+
ret = njs_function_frame(vm, func, this, args, length, 0);
if (njs_slow_path(ret != NJS_OK)) {
return ret;
}

- ret = njs_function_frame_invoke(vm, retval);
+ ret = njs_function_frame_invoke(vm, frame->retval);
if (njs_slow_path(ret != NJS_OK)) {
return ret;
}
diff -r 4d33ea223de0 -r 6df48738a043 src/njs_value.h
--- a/src/njs_value.h Tue Nov 05 20:49:57 2019 +0300
+++ b/src/njs_value.h Fri Nov 08 16:29:24 2019 +0300
@@ -234,14 +234,14 @@ struct njs_function_s {
njs_object_t object;

uint8_t args_offset;
- uint8_t args_count;

- /* Function is a closure. */
+ uint8_t args_count:5;
uint8_t closure:1;
-
uint8_t native:1;
uint8_t ctor:1;

+ uint8_t magic;
+
union {
njs_function_lambda_t *lambda;
njs_function_native_t native;
@@ -391,12 +391,13 @@ typedef struct {
}


-#define njs_native_function(_function, _args_count) { \
+#define _njs_native_function(_function, _args_count, _magic) { \
.data = { \
.type = NJS_FUNCTION, \
.truth = 1, \
.u.function = & (njs_function_t) { \
.native = 1, \
+ .magic = _magic, \
.args_count = _args_count, \
.args_offset = 1, \
.u.native = _function, \
@@ -408,6 +409,14 @@ typedef struct {
}


+#define njs_native_function(_function, _args_count) \
+ _njs_native_function(_function, _args_count, 0)
+
+
+#define njs_native_function2(_function, _args_count, _magic) \
+ _njs_native_function(_function, _args_count, _magic)
+
+
#define njs_prop_handler(_handler) { \
.data = { \
.type = NJS_INVALID, \
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[njs] Passing to native function additional magic argument.

Dmitry Volyntsev 34 November 08, 2019 08:32AM



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