libperf: Add 'overwrite' to 'struct perf_mmap'

[linux.git] / tools / perf / util / mmap.h

diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 274ce389cd84891f0c97bf3184460e72a108912b..d3e74c8da51a41b896cf9571d10b78cc21320307 100644 (file)
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -1,11 +1,13 @@
 #ifndef __PERF_MMAP_H
 #define __PERF_MMAP_H 1
 
+#include <internal/mmap.h>
 #include <linux/compiler.h>
 #include <linux/refcount.h>
 #include <linux/types.h>
 #include <linux/ring_buffer.h>
 #include <stdbool.h>
+#include <pthread.h> // for cpu_set_t
 #ifdef HAVE_AIO_SUPPORT
 #include <aio.h>
 #endif
@@ -14,20 +16,12 @@
 
 struct aiocb;
 /**
- * struct perf_mmap - perf's ring buffer mmap details
+ * struct mmap - perf's ring buffer mmap details
  *
  * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
  */
-struct perf_mmap {
-       void             *base;
-       int              mask;
-       int              fd;
-       int              cpu;
-       refcount_t       refcnt;
-       u64              prev;
-       u64              start;
-       u64              end;
-       bool             overwrite;
+struct mmap {
+       struct perf_mmap        core;
        struct auxtrace_mmap auxtrace_mmap;
        char             event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
 #ifdef HAVE_AIO_SUPPORT
@@ -44,66 +38,38 @@ struct perf_mmap {
        int             comp_level;
 };
 
-/*
- * State machine of bkw_mmap_state:
- *
- *                     .________________(forbid)_____________.
- *                     |                                     V
- * NOTREADY --(0)--> RUNNING --(1)--> DATA_PENDING --(2)--> EMPTY
- *                     ^  ^              |   ^               |
- *                     |  |__(forbid)____/   |___(forbid)___/|
- *                     |                                     |
- *                      \_________________(3)_______________/
- *
- * NOTREADY     : Backward ring buffers are not ready
- * RUNNING      : Backward ring buffers are recording
- * DATA_PENDING : We are required to collect data from backward ring buffers
- * EMPTY        : We have collected data from backward ring buffers.
- *
- * (0): Setup backward ring buffer
- * (1): Pause ring buffers for reading
- * (2): Read from ring buffers
- * (3): Resume ring buffers for recording
- */
-enum bkw_mmap_state {
-       BKW_MMAP_NOTREADY,
-       BKW_MMAP_RUNNING,
-       BKW_MMAP_DATA_PENDING,
-       BKW_MMAP_EMPTY,
-};
-
 struct mmap_params {
        int prot, mask, nr_cblocks, affinity, flush, comp_level;
        struct auxtrace_mmap_params auxtrace_mp;
 };
 
-int perf_mmap__mmap(struct perf_mmap *map, struct mmap_params *mp, int fd, int cpu);
-void perf_mmap__munmap(struct perf_mmap *map);
+int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
+void perf_mmap__munmap(struct mmap *map);
 
-void perf_mmap__get(struct perf_mmap *map);
-void perf_mmap__put(struct perf_mmap *map);
+void perf_mmap__get(struct mmap *map);
+void perf_mmap__put(struct mmap *map);
 
-void perf_mmap__consume(struct perf_mmap *map);
+void perf_mmap__consume(struct mmap *map);
 
-static inline u64 perf_mmap__read_head(struct perf_mmap *mm)
+static inline u64 perf_mmap__read_head(struct mmap *mm)
 {
-       return ring_buffer_read_head(mm->base);
+       return ring_buffer_read_head(mm->core.base);
 }
 
-static inline void perf_mmap__write_tail(struct perf_mmap *md, u64 tail)
+static inline void perf_mmap__write_tail(struct mmap *md, u64 tail)
 {
-       ring_buffer_write_tail(md->base, tail);
+       ring_buffer_write_tail(md->core.base, tail);
 }
 
-union perf_event *perf_mmap__read_forward(struct perf_mmap *map);
+union perf_event *perf_mmap__read_forward(struct mmap *map);
 
-union perf_event *perf_mmap__read_event(struct perf_mmap *map);
+union perf_event *perf_mmap__read_event(struct mmap *map);
 
-int perf_mmap__push(struct perf_mmap *md, void *to,
-                   int push(struct perf_mmap *map, void *to, void *buf, size_t size));
+int perf_mmap__push(struct mmap *md, void *to,
+                   int push(struct mmap *map, void *to, void *buf, size_t size));
 
-size_t perf_mmap__mmap_len(struct perf_mmap *map);
+size_t perf_mmap__mmap_len(struct mmap *map);
 
-int perf_mmap__read_init(struct perf_mmap *md);
-void perf_mmap__read_done(struct perf_mmap *map);
+int perf_mmap__read_init(struct mmap *md);
+void perf_mmap__read_done(struct mmap *map);
 #endif /*__PERF_MMAP_H */