2 * utils - misc libubox utility functions
4 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 #define foreach_arg(_arg, _addr, _len, _first_addr, _first_len) \
26 for (_addr = (_first_addr), _len = (_first_len); \
28 _addr = va_arg(_arg, void **), _len = _addr ? va_arg(_arg, size_t) : 0)
30 #define C_PTR_ALIGN (sizeof(size_t))
31 #define C_PTR_MASK (-C_PTR_ALIGN)
33 void *__calloc_a(size_t len, ...)
45 foreach_arg(ap1, cur_addr, cur_len, &ret, len)
46 alloc_len += (cur_len + C_PTR_ALIGN - 1 ) & C_PTR_MASK;
49 ptr = calloc(1, alloc_len);
53 foreach_arg(ap, cur_addr, cur_len, &ret, len) {
54 *cur_addr = &ptr[alloc_len];
55 alloc_len += (cur_len + C_PTR_ALIGN - 1) & C_PTR_MASK;
62 #ifdef LIBUBOX_COMPAT_CLOCK_GETTIME
63 #include <mach/mach_host.h> /* host_get_clock_service() */
64 #include <mach/mach_port.h> /* mach_port_deallocate() */
65 #include <mach/mach_init.h> /* mach_host_self(), mach_task_self() */
66 #include <mach/clock.h> /* clock_get_time() */
68 static clock_serv_t clock_realtime;
69 static clock_serv_t clock_monotonic;
71 static void __constructor clock_name_init(void)
73 mach_port_t host_self = mach_host_self();
75 host_get_clock_service(host_self, CLOCK_REALTIME, &clock_realtime);
76 host_get_clock_service(host_self, CLOCK_MONOTONIC, &clock_monotonic);
79 static void __destructor clock_name_dealloc(void)
81 mach_port_t self = mach_task_self();
83 mach_port_deallocate(self, clock_realtime);
84 mach_port_deallocate(self, clock_monotonic);
87 int clock_gettime(int type, struct timespec *tv)
94 retval = clock_get_time(clock_realtime, &mts);
97 retval = clock_get_time(clock_monotonic, &mts);
103 tv->tv_sec = mts.tv_sec;
104 tv->tv_nsec = mts.tv_nsec;
111 void *cbuf_alloc(unsigned int order)
113 char path[] = "/tmp/cbuf-XXXXXX";
114 unsigned long size = cbuf_size(order);
125 if (ftruncate(fd, cbuf_size(order)))
128 #ifndef MAP_ANONYMOUS
129 #define MAP_ANONYMOUS MAP_ANON
132 ret = mmap(NULL, size * 2, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0);
133 if (ret == MAP_FAILED) {
138 if (mmap(ret, size, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED,
140 mmap(ret + size, size, PROT_READ | PROT_WRITE,
141 MAP_FIXED | MAP_SHARED, fd, 0) != ret + size) {
142 munmap(ret, size * 2);
151 void cbuf_free(void *ptr, unsigned int order)
153 munmap(ptr, cbuf_size(order) * 2);