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59d7ea620b
Move perf_mmap__unmap() from tools/perf to libperf, to internal header internal/mmap.h. It will be used in the following patches. And rename the existing perf's function to mmap__munmap(). Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20191007125344.14268-7-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
48 lines
957 B
C
48 lines
957 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <sys/mman.h>
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#include <internal/mmap.h>
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#include <internal/lib.h>
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void perf_mmap__init(struct perf_mmap *map, bool overwrite)
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{
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map->fd = -1;
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map->overwrite = overwrite;
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refcount_set(&map->refcnt, 0);
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}
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size_t perf_mmap__mmap_len(struct perf_mmap *map)
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{
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return map->mask + 1 + page_size;
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}
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int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
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int fd, int cpu)
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{
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map->prev = 0;
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map->mask = mp->mask;
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map->base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot,
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MAP_SHARED, fd, 0);
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if (map->base == MAP_FAILED) {
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map->base = NULL;
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return -1;
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}
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map->fd = fd;
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map->cpu = cpu;
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return 0;
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}
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void perf_mmap__munmap(struct perf_mmap *map)
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{
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if (map && map->base != NULL) {
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munmap(map->base, perf_mmap__mmap_len(map));
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map->base = NULL;
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map->fd = -1;
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refcount_set(&map->refcnt, 0);
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}
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}
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void perf_mmap__get(struct perf_mmap *map)
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{
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refcount_inc(&map->refcnt);
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}
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