147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _LIBMEMTRACK_MEMTRACK_H_
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#define _LIBMEMTRACK_MEMTRACK_H_
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#include <sys/types.h>
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#include <stddef.h>
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#include <cutils/compiler.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* struct memtrack_proc
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*
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* an opaque handle to the memory stats on a process.
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* Created with memtrack_proc_new, destroyed by
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* memtrack_proc_destroy. Can be reused multiple times with
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* memtrack_proc_get.
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*/
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struct memtrack_proc;
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/**
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* memtrack_init
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*
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* Must be called once before calling any other functions. After this function
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* is called, everything else is thread-safe.
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*
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* Returns 0 on success, -errno on error.
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*/
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int memtrack_init(void);
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/**
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* memtrack_proc_new
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*
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* Return a new handle to hold process memory stats.
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*
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* Returns NULL on error.
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*/
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struct memtrack_proc *memtrack_proc_new(void);
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/**
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* memtrack_proc_destroy
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*
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* Free all memory associated with a process memory stats handle.
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*/
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void memtrack_proc_destroy(struct memtrack_proc *p);
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/**
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* memtrack_proc_get
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*
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* Fill a process memory stats handle with data about the given pid. Can be
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* called on a handle that was just allocated with memtrack_proc_new,
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* or on a handle that has been previously passed to memtrack_proc_get
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* to replace the data with new data on the same or another process. It is
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* expected that the second call on the same handle should not require
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* allocating any new memory.
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*
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* Returns 0 on success, -errno on error.
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*/
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int memtrack_proc_get(struct memtrack_proc *p, pid_t pid);
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/**
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* memtrack_proc_graphics_total
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*
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* Return total amount of memory that has been allocated for use as window
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* buffers. Does not differentiate between memory that has already been
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* accounted for by reading /proc/pid/smaps and memory that has not been
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* accounted for.
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*
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* Returns non-negative size in bytes on success, -errno on error.
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*/
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ssize_t memtrack_proc_graphics_total(struct memtrack_proc *p);
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/**
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* memtrack_proc_graphics_pss
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*
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* Return total amount of memory that has been allocated for use as window
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* buffers, but has not already been accounted for by reading /proc/pid/smaps.
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* Memory that is shared across processes may already be divided by the
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* number of processes that share it (preferred), or may be charged in full to
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* every process that shares it, depending on the capabilities of the driver.
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*
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* Returns non-negative size in bytes on success, -errno on error.
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*/
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ssize_t memtrack_proc_graphics_pss(struct memtrack_proc *p);
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/**
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* memtrack_proc_gl_total
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*
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* Same as memtrack_proc_graphics_total, but counts GL memory (which
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* should not overlap with graphics memory) instead of graphics memory.
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*
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* Returns non-negative size in bytes on success, -errno on error.
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*/
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ssize_t memtrack_proc_gl_total(struct memtrack_proc *p);
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/**
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* memtrack_proc_gl_pss
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*
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* Same as memtrack_proc_graphics_total, but counts GL memory (which
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* should not overlap with graphics memory) instead of graphics memory.
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*
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* Returns non-negative size in bytes on success, -errno on error.
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*/
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ssize_t memtrack_proc_gl_pss(struct memtrack_proc *p);
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/**
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* memtrack_proc_gl_total
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*
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* Same as memtrack_proc_graphics_total, but counts miscellaneous memory
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* not tracked by gl or graphics calls above.
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*
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* Returns non-negative size in bytes on success, -errno on error.
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*/
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ssize_t memtrack_proc_other_total(struct memtrack_proc *p);
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/**
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* memtrack_proc_gl_pss
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*
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* Same as memtrack_proc_graphics_total, but counts miscellaneous memory
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* not tracked by gl or graphics calls above.
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*
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* Returns non-negative size in bytes on success, -errno on error.
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*/
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ssize_t memtrack_proc_other_pss(struct memtrack_proc *p);
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#ifdef __cplusplus
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}
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#endif
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#endif
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