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resolve race on option initialization

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This commit is contained in:
daan 2019-08-25 11:18:16 -07:00
parent 7f29dec44a
commit 7972b64a82
1 changed files with 8 additions and 1 deletions
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9
src/options.c
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@ -18,6 +18,9 @@ int mi_version(void) mi_attr_noexcept {
// --------------------------------------------------------
// Options
// These can be accessed by multiple threads and may be
// concurrently initialized, but an initializing data race
// is ok since they resolve to the same value.
// --------------------------------------------------------
typedef enum mi_init_e {
UNINIT, // not yet initialized
@ -180,7 +183,6 @@ static void mi_strlcat(char* dest, const char* src, size_t dest_size) {
}
static void mi_option_init(mi_option_desc_t* desc) {
desc->init = DEFAULTED;
// Read option value from the environment
char buf[32];
mi_strlcpy(buf, "mimalloc_", sizeof(buf));
@ -218,7 +220,12 @@ static void mi_option_init(mi_option_desc_t* desc) {
}
else {
_mi_warning_message("environment option mimalloc_%s has an invalid value: %s\n", desc->name, buf);
desc->init = DEFAULTED;
}
}
}
else {
desc->init = DEFAULTED;
}
mi_assert_internal(desc->init != UNINIT);
}