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add new API pa_memblock_will_need() and make use of PA_PAGE_SIZE macro

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1746 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2007-09-02 20:37:17 +00:00
parent 2f7b6fead1
commit f36ca79716
2 changed files with 21 additions and 13 deletions
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32
src/pulsecore/memblock.c
View file

@ -32,6 +32,7 @@
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <pulse/xmalloc.h>
#include <pulse/def.h>
@ -42,6 +43,7 @@
#include <pulsecore/semaphore.h>
#include <pulsecore/macro.h>
#include <pulsecore/flist.h>
#include <pulsecore/core-util.h>
#include "memblock.h"
@ -596,6 +598,20 @@ void pa_memblock_unref_fixed(pa_memblock *b) {
pa_memblock_unref(b);
}
/* No lock necessary. */
pa_memblock *pa_memblock_will_need(pa_memblock *b) {
void *p;
pa_assert(b);
pa_assert(PA_REFCNT_VALUE(b) > 0);
p = pa_memblock_acquire(b);
pa_will_need(p, b->length);
pa_memblock_release(b);
return b;
}
/* Self-locked. This function is not multiple-caller safe */
static void memblock_replace_import(pa_memblock *b) {
pa_memimport_segment *seg;
@ -628,7 +644,6 @@ static void memblock_replace_import(pa_memblock *b) {
}
pa_mempool* pa_mempool_new(int shared) {
size_t ps;
pa_mempool *p;
p = pa_xnew(pa_mempool, 1);
@ -636,18 +651,9 @@ pa_mempool* pa_mempool_new(int shared) {
p->mutex = pa_mutex_new(1);
p->semaphore = pa_semaphore_new(0);
#ifdef HAVE_SYSCONF
ps = (size_t) sysconf(_SC_PAGESIZE);
#elif defined(PAGE_SIZE)
ps = (size_t) PAGE_SIZE;
#else
ps = 4096; /* Let's hope it's like x86. */
#endif
p->block_size = (PA_MEMPOOL_SLOT_SIZE/ps)*ps;
if (p->block_size < ps)
p->block_size = ps;
p->block_size = PA_PAGE_ALIGN(PA_MEMPOOL_SLOT_SIZE);
if (p->block_size < PA_PAGE_SIZE)
p->block_size = PA_PAGE_SIZE;
p->n_blocks = PA_MEMPOOL_SLOTS_MAX;

2
src/pulsecore/memblock.h
View file

@ -113,6 +113,8 @@ void pa_memblock_release(pa_memblock *b);
size_t pa_memblock_get_length(pa_memblock *b);
pa_mempool * pa_memblock_get_pool(pa_memblock *b);
pa_memblock *pa_memblock_will_need(pa_memblock *b);
/* The memory block manager */
pa_mempool* pa_mempool_new(int shared);
void pa_mempool_free(pa_mempool *p);