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72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
/*
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* lib_strbuf.c - init_lib() and library string storage
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <isc/mutex.h>
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#include <isc/net.h>
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#include <isc/result.h>
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#include "ntp_fp.h"
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#include "ntp_stdlib.h"
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#include "lib_strbuf.h"
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#define LIB_NUMBUF 10
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/*
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* Storage declarations
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*/
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static char lib_stringbuf_storage[LIB_NUMBUF][LIB_BUFLENGTH];
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static char * lib_stringbuf[LIB_NUMBUF];
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int lib_inited;
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static isc_mutex_t lib_mutex;
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int ipv4_works;
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int ipv6_works;
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int debug;
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/*
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* initialization routine. Might be needed if the code is ROMized.
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*/
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void
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init_lib(void)
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{
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u_int u;
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if (lib_inited) {
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return;
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}
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ipv4_works = (ISC_R_SUCCESS == isc_net_probeipv4());
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ipv6_works = (ISC_R_SUCCESS == isc_net_probeipv6());
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init_systime();
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/*
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* Avoid -Wrestrict warnings by keeping a pointer to each buffer
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* so the compiler can see copying from one buffer to another is
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* not violating restrict qualifiers on, e.g. memcpy() args.
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*/
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for (u = 0; u < COUNTOF(lib_stringbuf); u++) {
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lib_stringbuf[u] = lib_stringbuf_storage[u];
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}
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isc_mutex_init(&lib_mutex);
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lib_inited = TRUE;
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}
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char *
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lib_getbuf(void)
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{
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static int lib_nextbuf;
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int mybuf;
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if (!lib_inited) {
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init_lib();
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}
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isc_mutex_lock(&lib_mutex);
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mybuf = lib_nextbuf;
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lib_nextbuf = (1 + mybuf) % COUNTOF(lib_stringbuf);
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isc_mutex_unlock(&lib_mutex);
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zero_mem(lib_stringbuf[mybuf], LIB_BUFLENGTH);
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return lib_stringbuf[mybuf];
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} |