uClibc: make res_init() thread safe
Signed-off-by: Jiri Slachta <slachta@cesnet.cz> SVN-Revision: 39178
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1 changed files with 55 additions and 0 deletions
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@ -0,0 +1,55 @@
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--- a/libc/inet/resolv.c
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+++ b/libc/inet/resolv.c
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@@ -3432,6 +3432,7 @@ static void res_sync_func(void)
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*/
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}
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+/* has to be called under __resolv_lock */
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static int
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__res_vinit(res_state rp, int preinit)
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{
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@@ -3440,7 +3441,6 @@ __res_vinit(res_state rp, int preinit)
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int m = 0;
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#endif
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- __UCLIBC_MUTEX_LOCK(__resolv_lock);
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__close_nameservers();
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__open_nameservers();
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@@ -3532,7 +3532,6 @@ __res_vinit(res_state rp, int preinit)
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rp->options |= RES_INIT;
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- __UCLIBC_MUTEX_UNLOCK(__resolv_lock);
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return 0;
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}
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@@ -3582,11 +3582,11 @@ res_init(void)
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if (!_res.id)
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_res.id = res_randomid();
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- __UCLIBC_MUTEX_UNLOCK(__resolv_lock);
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-
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__res_vinit(&_res, 1);
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__res_sync = res_sync_func;
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+ __UCLIBC_MUTEX_UNLOCK(__resolv_lock);
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+
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return 0;
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}
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libc_hidden_def(res_init)
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@@ -3687,7 +3687,11 @@ struct __res_state *__resp = &_res;
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int
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res_ninit(res_state statp)
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{
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- return __res_vinit(statp, 0);
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+ int ret;
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+ __UCLIBC_MUTEX_LOCK(__resolv_lock);
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+ ret = __res_vinit(statp, 0);
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+ __UCLIBC_MUTEX_UNLOCK(__resolv_lock);
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+ return ret;
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}
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#endif /* L_res_init */
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--
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