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8915eacef8
This patch avoids warnings for unused results of setuid and setgid in nscd/connections.c using an ignore_value macro along the lines suggested by Paul in <https://sourceware.org/ml/libc-alpha/2014-11/msg00733.html>. Tested for x86_64. * include/libc-internal.h (ignore_value): New macro. * nscd/connections.c (restart): Wrap calls to setuid and setgid with ignore_value.
80 lines
3.0 KiB
C
80 lines
3.0 KiB
C
/* This file contains a number of internal prototype declarations that
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don't fit anywhere else. */
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#ifndef _LIBC_INTERNAL
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# define _LIBC_INTERNAL 1
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#include <hp-timing.h>
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/* Initialize the `__libc_enable_secure' flag. */
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extern void __libc_init_secure (void);
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/* This function will be called from _init in init-first.c. */
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extern void __libc_global_ctors (void);
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/* Discover the tick frequency of the machine if something goes wrong,
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we return 0, an impossible hertz. */
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extern int __profile_frequency (void);
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libc_hidden_proto (__profile_frequency)
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/* Hooks for the instrumenting functions. */
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extern void __cyg_profile_func_enter (void *this_fn, void *call_site);
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extern void __cyg_profile_func_exit (void *this_fn, void *call_site);
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/* Get frequency of the system processor. */
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extern hp_timing_t __get_clockfreq (void);
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/* Free all allocated resources. */
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extern void __libc_freeres (void);
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libc_hidden_proto (__libc_freeres)
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/* Free resources stored in thread-local variables on thread exit. */
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extern void __libc_thread_freeres (void);
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/* Define and initialize `__progname' et. al. */
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extern void __init_misc (int, char **, char **);
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/* 1 if 'type' is a pointer type, 0 otherwise. */
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# define __pointer_type(type) (__builtin_classify_type ((type) 0) == 5)
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/* __intptr_t if P is true, or T if P is false. */
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# define __integer_if_pointer_type_sub(T, P) \
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__typeof__ (*(0 ? (__typeof__ (0 ? (T *) 0 : (void *) (P))) 0 \
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: (__typeof__ (0 ? (__intptr_t *) 0 : (void *) (!(P)))) 0))
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/* __intptr_t if EXPR has a pointer type, or the type of EXPR otherwise. */
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# define __integer_if_pointer_type(expr) \
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__integer_if_pointer_type_sub(__typeof__ ((__typeof__ (expr)) 0), \
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__pointer_type (__typeof__ (expr)))
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/* Cast an integer or a pointer VAL to integer with proper type. */
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# define cast_to_integer(val) ((__integer_if_pointer_type (val)) (val))
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/* Align a value by rounding down to closest size.
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e.g. Using size of 4096, we get this behavior:
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{4095, 4096, 4097} = {0, 4096, 4096}. */
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#define ALIGN_DOWN(base, size) ((base) & -((__typeof__ (base)) (size)))
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/* Align a value by rounding up to closest size.
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e.g. Using size of 4096, we get this behavior:
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{4095, 4096, 4097} = {4096, 4096, 8192}.
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Note: The size argument has side effects (expanded multiple times). */
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#define ALIGN_UP(base, size) ALIGN_DOWN ((base) + (size) - 1, (size))
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/* Same as ALIGN_DOWN(), but automatically casts when base is a pointer. */
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#define PTR_ALIGN_DOWN(base, size) \
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((__typeof__ (base)) ALIGN_DOWN ((uintptr_t) (base), (size)))
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/* Same as ALIGN_UP(), but automatically casts when base is a pointer. */
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#define PTR_ALIGN_UP(base, size) \
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((__typeof__ (base)) ALIGN_UP ((uintptr_t) (base), (size)))
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/* Ignore the value of an expression when a cast to void does not
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suffice (in particular, for a call to a function declared with
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attribute warn_unused_result). */
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#define ignore_value(x) \
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({ __typeof__ (x) __ignored_value = (x); (void) __ignored_value; })
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#endif /* _LIBC_INTERNAL */
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