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authorThomas Martitz <kugel@rockbox.org>2013-05-29 07:12:01 +0200
committerThomas Martitz <kugel@rockbox.org>2013-12-22 23:11:32 +0100
commitd25a512caf4adf2aac3ce6ac8e1f2c556c0c6c37 (patch)
tree511bf41e94616408e4253e1829772c7994561aac /firmware/include
parent9f878b105dbb51e18adfc3023adc09bc6f61fad3 (diff)
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buflib: Try harder in buflib_alloc_maximum().
This function will now ask shrinkable allocations to give up all of their memory. With future support of playback.c this can be used as a safe replacement for audio_get_buffer(). Change-Id: I290a51d2c75254e66baf5698c41dc444dea6247a
Diffstat (limited to 'firmware/include')
-rw-r--r--firmware/include/buflib.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/firmware/include/buflib.h b/firmware/include/buflib.h
index 7183951c6c..aa6c232f72 100644
--- a/firmware/include/buflib.h
+++ b/firmware/include/buflib.h
@@ -111,10 +111,10 @@ struct buflib_callbacks {
void (*sync_callback)(int handle, bool sync_on);
};
-#define BUFLIB_SHRINK_POS_MASK ((1<<0|1<<1)<<30)
#define BUFLIB_SHRINK_SIZE_MASK (~BUFLIB_SHRINK_POS_MASK)
#define BUFLIB_SHRINK_POS_FRONT (1u<<31)
#define BUFLIB_SHRINK_POS_BACK (1u<<30)
+#define BUFLIB_SHRINK_POS_MASK (BUFLIB_SHRINK_POS_FRONT|BUFLIB_SHRINK_POS_BACK)
/**
* Possible return values for the callbacks, some of them can cause
@@ -193,8 +193,10 @@ int buflib_alloc_ex(struct buflib_context *ctx, size_t size, const char *name,
* will allow buflib to permit allocations by shrinking the buffer returned by
* this function.
*
- * Note that this currently gives whatever buflib_available() returns. However,
- * do not depend on this behavior, it may change.
+ * Note that this might return many more bytes than buflib_available() or
+ * buflib_allocatable() return, because it agressively compacts the pool
+ * and even shrinks other allocations. However, do not depend on this behavior,
+ * it may change.
*
* name: A string identifier giving this allocation a name
* size: The actual size will be returned into size