#ifndef __PERF_STRBUF_H #define __PERF_STRBUF_H /* * Strbuf's can be use in many ways: as a byte array, or to store arbitrary * long, overflow safe strings. * * Strbufs has some invariants that are very important to keep in mind: * * 1. the ->buf member is always malloc-ed, hence strbuf's can be used to * build complex strings/buffers whose final size isn't easily known. * * It is NOT legal to copy the ->buf pointer away. * `strbuf_detach' is the operation that detachs a buffer from its shell * while keeping the shell valid wrt its invariants. * * 2. the ->buf member is a byte array that has at least ->len + 1 bytes * allocated. The extra byte is used to store a '\0', allowing the ->buf * member to be a valid C-string. Every strbuf function ensure this * invariant is preserved. * * Note that it is OK to "play" with the buffer directly if you work it * that way: * * strbuf_grow(sb, SOME_SIZE); * ... Here, the memory array starting at sb->buf, and of length * ... strbuf_avail(sb) is all yours, and you are sure that * ... strbuf_avail(sb) is at least SOME_SIZE. * strbuf_setlen(sb, sb->len + SOME_OTHER_SIZE); * * Of course, SOME_OTHER_SIZE must be smaller or equal to strbuf_avail(sb). * * Doing so is safe, though if it has to be done in many places, adding the * missing API to the strbuf module is the way to go. * * XXX: do _not_ assume that the area that is yours is of size ->alloc - 1 * even if it's true in the current implementation. Alloc is somehow a * "private" member that should not be messed with. */ #include #include #include #include #include extern char strbuf_slopbuf[]; struct strbuf { size_t alloc; size_t len; char *buf; }; #define STRBUF_INIT { 0, 0, strbuf_slopbuf } /*----- strbuf life cycle -----*/ int strbuf_init(struct strbuf *buf, ssize_t hint); void strbuf_release(struct strbuf *buf); char *strbuf_detach(struct strbuf *buf, size_t *); /*----- strbuf size related -----*/ static inline ssize_t strbuf_avail(const struct strbuf *sb) { return sb->alloc ? sb->alloc - sb->len - 1 : 0; } int strbuf_grow(struct strbuf *buf, size_t); static inline int strbuf_setlen(struct strbuf *sb, size_t len) { if (!sb->alloc) { int ret = strbuf_grow(sb, 0); if (ret) return ret; } assert(len < sb->alloc); sb->len = len; sb->buf[len] = '\0'; return 0; } /*----- add data in your buffer -----*/ int strbuf_addch(struct strbuf *sb, int c); int strbuf_add(struct strbuf *buf, const void *, size_t); static inline int strbuf_addstr(struct strbuf *sb, const char *s) { return strbuf_add(sb, s, strlen(s)); } __attribute__((format(printf,2,3))) int strbuf_addf(struct strbuf *sb, const char *fmt, ...); /* XXX: if read fails, any partial read is undone */ ssize_t strbuf_read(struct strbuf *, int fd, ssize_t hint); #endif /* __PERF_STRBUF_H */ 2d77e98eb72b94'>root/sound/pci/ctxfi/ctimap.c

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Diffstat (limited to 'sound/pci/ctxfi/ctimap.c')

:54:39 -0800

committer	Linus Torvalds <torvalds@linux-foundation.org>	2017-01-24 16:54:39 -0800
commit	883af14e67e8b8702b5560aa64c888c0cd0bd66c (patch)
tree	74e3a6b53f5fad9f7848ab1b9f6921b7012940a4 /sound/firewire/oxfw/oxfw.h
parent	0263d4ebd94b36280608e296cba39b924b6e832b (diff)
parent	aab45453ff5c77200c6da4ac909f7a4392aed17e (diff)

Merge branch 'akpm' (patches from Andrew)

Merge fixes from Andrew Morton: "26 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (26 commits) MAINTAINERS: add Dan Streetman to zbud maintainers MAINTAINERS: add Dan Streetman to zswap maintainers mm: do not export ioremap_page_range symbol for external module mn10300: fix build error of missing fpu_save() romfs: use different way to generate fsid for BLOCK or MTD frv: add missing atomic64 operations mm, page_alloc: fix premature OOM when racing with cpuset mems update mm, page_alloc: move cpuset seqcount checking to slowpath mm, page_alloc: fix fast-path race with cpuset update or removal mm, page_alloc: fix check for NULL preferred_zone kernel/panic.c: add missing \n fbdev: color map copying bounds checking frv: add atomic64_add_unless() mm/mempolicy.c: do not put mempolicy before using its nodemask radix-tree: fix private list warnings Documentation/filesystems/proc.txt: add VmPin mm, memcg: do not retry precharge charges proc: add a schedule point in proc_pid_readdir() mm: alloc_contig: re-allow CMA to compact FS pages mm/slub.c: trace free objects at KERN_INFO ...

Diffstat (limited to 'sound/firewire/oxfw/oxfw.h')