diff options
Diffstat (limited to 'libelf/elf_version.c')
| -rw-r--r-- | libelf/elf_version.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/libelf/elf_version.c b/libelf/elf_version.c index 6ec534ab..8296bb65 100644 --- a/libelf/elf_version.c +++ b/libelf/elf_version.c @@ -32,12 +32,21 @@ #endif #include <libelfP.h> +#include <pthread.h> +/* Multiple threads may initialize __libelf_version. + pthread_once() ensures that __libelf_version is initialized only once. */ +once_define(static, version_once); /* Currently selected version. Should be EV_CURRENT. Will be EV_NONE if elf_version () has not been called yet. */ unsigned int __libelf_version = EV_NONE; +static void initialize_version(void) +{ + __libelf_version = EV_CURRENT; +} + unsigned int elf_version (unsigned int version) { @@ -49,7 +58,7 @@ elf_version (unsigned int version) /* Phew, we know this version. */ /* Signal that the version is now initialized. */ - __libelf_version = EV_CURRENT; + once(version_once, initialize_version); /* And return the last (or initial) version. */ return EV_CURRENT; |