dawn-cmake/generator/templates/dawn_thread_dispatch_proc.cpp
Austin Eng 16e01affcb Reland "Add a per-thread proc table using thread local storage"
This is a reland of b04a92f01be0e7dc2faf91e0f6f974f990e8b2f2
with the deletion of a duplicate exported function in dawn_wire that
was causing a compilation failure on Windows.

Original change's description:
> Add a per-thread proc table using thread local storage
>
> In situations where both dawn_wire and dawn_native are used on separate
> threads (Chrome with --single-process or --in-process-gpu), it's
> desirable to have a per-thread proc table so that the WebGPU C++ API can
> still be used. This eliminates classes of bugs with manual
> reference/release errors.
>
> This also changes many of the GetProcs functions to return const
> references to the static proc tables known at compile time, instead of a
> copy.
>
> Bug: none
> Change-Id: I8775bb715b312dd9476a1903fbd797d4b1302614
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/29240
> Reviewed-by: Stephen White <senorblanco@chromium.org>
> Reviewed-by: Corentin Wallez <cwallez@chromium.org>
> Commit-Queue: Austin Eng <enga@chromium.org>

Bug: none
Change-Id: Id90e5372132cd93a2f8631c8185d0e71b01bc1af
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/29443
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
2020-10-06 16:13:42 +00:00

53 lines
1.7 KiB
C++

#include "dawn/dawn_thread_dispatch_proc.h"
#include <thread>
static DawnProcTable nullProcs;
thread_local DawnProcTable perThreadProcs;
void dawnProcSetPerThreadProcs(const DawnProcTable* procs) {
if (procs) {
perThreadProcs = *procs;
} else {
perThreadProcs = nullProcs;
}
}
static WGPUProc ThreadDispatchGetProcAddress(WGPUDevice device, const char* procName) {
return perThreadProcs.getProcAddress(device, procName);
}
static WGPUInstance ThreadDispatchCreateInstance(WGPUInstanceDescriptor const * descriptor) {
return perThreadProcs.createInstance(descriptor);
}
{% for type in by_category["object"] %}
{% for method in c_methods(type) %}
static {{as_cType(method.return_type.name)}} ThreadDispatch{{as_MethodSuffix(type.name, method.name)}}(
{{-as_cType(type.name)}} {{as_varName(type.name)}}
{%- for arg in method.arguments -%}
, {{as_annotated_cType(arg)}}
{%- endfor -%}
) {
{% if method.return_type.name.canonical_case() != "void" %}return {% endif %}
perThreadProcs.{{as_varName(type.name, method.name)}}({{as_varName(type.name)}}
{%- for arg in method.arguments -%}
, {{as_varName(arg.name)}}
{%- endfor -%}
);
}
{% endfor %}
{% endfor %}
extern "C" {
DawnProcTable dawnThreadDispatchProcTable = {
ThreadDispatchGetProcAddress,
ThreadDispatchCreateInstance,
{% for type in by_category["object"] %}
{% for method in c_methods(type) %}
ThreadDispatch{{as_MethodSuffix(type.name, method.name)}},
{% endfor %}
{% endfor %}
};
}