Mercurial > cpython-lru_cache-weakref
diff Modules/dbhashmodule.c @ 2861:dc6b3e76cce6 legacy-trunk
add locking where it exists
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Wed, 26 Jul 1995 17:33:44 +0000 |
| parents | 4f6d5fe19812 |
| children | 65d2d8e67da3 |
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--- a/Modules/dbhashmodule.c Wed Jul 26 17:33:10 1995 +0000 +++ b/Modules/dbhashmodule.c Wed Jul 26 17:33:44 1995 +0000 @@ -334,19 +334,30 @@ return NULL; if (flag != NULL) { /* XXX need a way to pass O_EXCL, O_EXLOCK, O_NONBLOCK, O_SHLOCK */ - if (strcmp(flag, "r") == 0) + if (flag[0] == 'r') flags = O_RDONLY; - else if (strcmp(flag, "w") == 0) + else if (flag[0] == 'w') flags = O_RDWR; - else if (strcmp(flag, "c") == 0) + else if (flag[0] == 'c') flags = O_RDWR|O_CREAT; - else if (strcmp(flag, "n") == 0) + else if (flag[0] == 'n') flags = O_RDWR|O_CREAT|O_TRUNC; else { err_setstr(DbhashError, - "Flag should be one of 'r', 'w', 'c' or 'n'"); + "Flag should begin with 'r', 'w', 'c' or 'n'"); return NULL; } + if (flag[1] == 'l') { +#if defined(O_EXLOCK) && defined(O_SHLOCK) + if (flag[0] == 'r') + flags |= O_SHLOCK; + else + flags |= O_EXLOCK; +#else + err_setstr(DbhashError, "locking not supported on this platform"); + return NULL; +#endif + } } return newdbhashobject(file, flags, mode, bsize, ffactor, nelem, cachesize, hash, lorder);