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Try to release the GVL while gumbo parsing, for better concurrency #2964

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Try to release the GVL while gumbo parsing, for better concurrency #2964

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47 changes: 46 additions & 1 deletion ext/nokogiri/gumbo.c
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Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,7 @@ rb_utf8_str_new_static(const char *str, long length)
#include <nokogiri.h>
#include <libxml/tree.h>
#include <libxml/HTMLtree.h>
#include <ruby/thread.h>

// URI = system id
// external id = public id
Expand All @@ -86,16 +87,36 @@ get_parent(xmlNodePtr node)
return node->parent;
}

struct gumbo_parse_args {
const GumboOptions *options;
VALUE input;
};

static void *
nogvl_gumbo_parse_with_options(void *ptr)
{
struct gumbo_parse_args *gpa = ptr;
return (void *)gumbo_parse_with_options(gpa->options, RSTRING_PTR(gpa->input), RSTRING_LEN(gpa->input));
}

static GumboOutput *
perform_parse(const GumboOptions *options, VALUE input)
{
assert(RTEST(input));
Check_Type(input, T_STRING);
/*
GumboOutput *output = gumbo_parse_with_options(
options,
RSTRING_PTR(input),
RSTRING_LEN(input)
);
*/
struct gumbo_parse_args gpa;
gpa.options = options;
gpa.input = input;
GumboOutput *output = rb_thread_call_without_gvl(
nogvl_gumbo_parse_with_options, &gpa,
RUBY_UBF_IO, 0);

const char *status_string = gumbo_status_to_string(output->status);
switch (output->status) {
Expand Down Expand Up @@ -140,7 +161,7 @@ set_line(xmlNodePtr node, size_t line)
// Construct an XML tree rooted at xml_output_node from the Gumbo tree rooted
// at gumbo_node.
static void
build_tree(
build_tree0(
xmlDocPtr doc,
xmlNodePtr xml_output_node,
const GumboNode *gumbo_node
Expand Down Expand Up @@ -256,6 +277,30 @@ build_tree(
}
}

struct build_tree_args {
xmlDocPtr doc;
xmlNodePtr xml_output_node;
const GumboNode *gumbo_node;
};

static void *
nogvl_build_tree(void *ptr)
{
struct build_tree_args *bta = ptr;
build_tree0(bta->doc, bta->xml_output_node, bta->gumbo_node);
}

static void
build_tree(xmlDocPtr doc, xmlNodePtr xml_output_node, const GumboNode *gumbo_node)
{
//return build_tree0(doc, xml_output_node, gumbo_node);
struct build_tree_args bt;
bt.doc = doc;
bt.xml_output_node = xml_output_node;
bt.gumbo_node = gumbo_node;
rb_thread_call_without_gvl(nogvl_build_tree, &bt, RUBY_UBF_IO, 0);
}

static void
add_errors(const GumboOutput *output, VALUE rdoc, VALUE input, VALUE url)
{
Expand Down