[Mesa-dev] [PATCHv2 00/13] multithread GLSL compiler

[Chia-I Wu]

Hi list,

This is my second try to add multithread support for the GLSL compiler.
Changes since v1 are

 - glLinkProgram can now be threaded
 - added ctx->Const.DeferCompileShader and ctx->Const.DeferLinkProgram to
   allow drivers to control what get threaded
 - minimal changes to i965 to enable DeferLinkProgram

The most interesting patch should be patch 8, which makes the necessary
changes to core mesa.  Patch 13 touches i965 and is more a RFC patch.

v2 still requires applications to "Do the Right Thing" to benefit from
multithread compiler.  But that can be changed as noted in patch 8.  I am open
to suggestions.

A summary of the patches:

Patch 1 makes our GL_KRH_debug implementation thread-safe.

Patch 2~5 make the GLSL compiler thread-safe.  These are mostly the same as v1,
except for how locale_t is initialized.

Patch 6~7 add a singleton thread pool to the compiler.

Patch 8 adds the infrastructure to core mesa to enable multithread
compiling/linkg, and patch 9 adds a dri option to enable DeferCompileShader
for i965.

Patch 10~12 refactor some code in i965 and patch 13 adds the necessary changes
to enable DeferLinkProgram.