48fb7bfab7
highlights from: http://gcc.gnu.org/gcc-4.6/changes.html GCC now has stricter checks for invalid command-line options New -Wunused-but-set-variable and -Wunused-but-set-parameter warnings Many platforms have been obsoleted Link-time optimization improvements A new switch -fstack-usage has been added A new function attribute leaf was introduced A new warning, enabled by -Wdouble-promotion Support for selectively enabling and disabling warnings via #pragma GCC diagnostic has been added There is now experimental support for some features from the upcoming C1X revision of the ISO C standard Improved experimental support for the upcoming C++0x ISO C++ standard G++ now issues clearer diagnostics in several cases Updates for ARM, x86, MIPS, PPC/PPC64, SPARC Darwin, FreeBSD, Solaris 2, MinGW and Cygwin now all support __float128 on 32-bit and 64-bit x86 targets. [*1] highlights from: http://gcc.gnu.org/gcc-4.7/changes.html The -fconserve-space flag has been deprecated Support for a new parameter --param case-values-threshold=n was added Interprocedural and Link-time optimization improvements A new built-in, __builtin_assume_aligned, has been added A new warning option -Wunused-local-typedefs was added A new experimental command-line option -ftrack-macro-expansion was added Support for atomic operations specifying the C++11/C11 memory model has been added There is support for some more features from the C11 revision of the ISO C standard Improved experimental support for the new ISO C++ standard, C++11 Updates for ARM, x86, MIPS, PPC/PPC64, SH, SPARC, TILE* A new option (-grecord-gcc-switches) was added highlights from: http://gcc.gnu.org/gcc-4.8/changes.html GCC now uses C++ as its implementation language. This means that to build GCC from sources, you will need a C++ compiler that understands C++ 2003 DWARF4 is now the default when generating DWARF debug information A new general optimization level, -Og, has been introduced A new option -ftree-partial-pre was added The option -fconserve-space has been removed The command-line options -fipa-struct-reorg and -fipa-matrix-reorg have been removed Interprocedural and Link-time optimization improvements AddressSanitizer, a fast memory error detector, has been added [*2] A new -Wsizeof-pointer-memaccess warning has been added G++ now supports a -std=c++1y option for experimentation with features proposed for the next revision of the standard, expected around 2014 Improved experimental support for the new ISO C++ standard, C++11 A new port has been added to support AArch64 Updates for ARM, x86, MIPS, PPC/PPC64, SH, SPARC, TILE* [*1] we should support this too! [*2] we should look into this. https://code.google.com/p/address-sanitizer/
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/* insque(3C) routines
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This file is in the public domain. */
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/*
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@deftypefn Supplemental void insque (struct qelem *@var{elem}, @
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struct qelem *@var{pred})
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@deftypefnx Supplemental void remque (struct qelem *@var{elem})
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Routines to manipulate queues built from doubly linked lists. The
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@code{insque} routine inserts @var{elem} in the queue immediately
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after @var{pred}. The @code{remque} routine removes @var{elem} from
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its containing queue. These routines expect to be passed pointers to
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structures which have as their first members a forward pointer and a
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back pointer, like this prototype (although no prototype is provided):
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@example
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struct qelem @{
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struct qelem *q_forw;
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struct qelem *q_back;
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char q_data[];
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@};
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@end example
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@end deftypefn
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*/
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struct qelem {
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struct qelem *q_forw;
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struct qelem *q_back;
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};
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void
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insque (struct qelem *elem, struct qelem *pred)
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{
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elem -> q_forw = pred -> q_forw;
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pred -> q_forw -> q_back = elem;
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elem -> q_back = pred;
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pred -> q_forw = elem;
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}
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void
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remque (struct qelem *elem)
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{
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elem -> q_forw -> q_back = elem -> q_back;
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elem -> q_back -> q_forw = elem -> q_forw;
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}
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