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Document rules for initialization/cleanup of ZTS globals.

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Transfer stesie's comment from the c3512587ac
commit message so that future additions to v8js_globals maintain the
proper ZTS behavior.
This commit is contained in:
C. Scott Ananian 2013-10-26 22:38:44 -04:00
parent ae2ad9967d
commit 7cdcb5f45e
1 changed files with 10 additions and 0 deletions
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10
v8js.cc
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@ -1670,6 +1670,16 @@ static PHP_MINFO_FUNCTION(v8js)
*/
static PHP_GINIT_FUNCTION(v8js)
{
/*
If ZTS is disabled, the v8js_globals instance is declared right
in the BSS and hence automatically initialized by C++ compiler.
Most of the variables are just zeroed.
If ZTS is enabled however, v8js_globals just points to a freshly
allocated, uninitialized piece of memory, hence we need to
initialize all fields on our own. Likewise on shutdown we have to
run the destructors manually.
*/
#ifdef ZTS
v8js_globals->extensions = NULL;
v8js_globals->v8_initialized = 0;