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Convert a number of allocations to use buflib pinning

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Several places in the codebase implemented an ad-hoc form of pinning;
they can be converted to use buflib pinning instead.

Change-Id: I4450be007e80f6c9cc9f56c2929fa4b9b85ebff3
This commit is contained in:
Aidan MacDonald 2022-04-03 11:16:39 +01:00
parent b16bae6fe6
commit 1718cf5f8a
10 changed files with 94 additions and 158 deletions
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29
firmware/common/unicode.c
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@ -168,6 +168,10 @@ static unsigned short default_cp_table_buf[MAX_CP_TABLE_SIZE+1];
do {} while (0)
#define cp_table_alloc(filename, size, opsp) \
({ (void)(opsp); 1; })
#define cp_table_pin(handle) \
do { (void)handle; } while(0)
#define cp_table_unpin(handle) \
do { (void)handle; } while(0)
#else
#define cp_table_alloc(filename, size, opsp) \
core_alloc_ex((filename), (size), (opsp))
@ -175,6 +179,10 @@ static unsigned short default_cp_table_buf[MAX_CP_TABLE_SIZE+1];
core_free(handle)
#define cp_table_get_data(handle) \
core_get_data(handle)
#define cp_table_pin(handle) \
core_pin(handle)
#define cp_table_unpin(handle) \
core_unpin(handle)
#endif
static const unsigned char utf8comp[6] =
@ -191,21 +199,8 @@ static inline void cptable_tohw16(uint16_t *buf, unsigned int count)
(void)buf; (void)count;
}
static int move_callback(int handle, void *current, void *new)
{
/* we don't keep a pointer but we have to stop it if this applies to a
buffer not yet swapped-in since it will likely be in use in an I/O
call */
return (handle != default_cp_handle || default_cp_table_ref != 0) ?
BUFLIB_CB_CANNOT_MOVE : BUFLIB_CB_OK;
(void)current; (void)new;
}
static int alloc_and_load_cp_table(int cp, void *buf)
{
static struct buflib_callbacks ops =
{ .move_callback = move_callback };
/* alloc and read only if there is an associated file */
const char *filename = cp_info[cp].filename;
if (!filename)
@ -228,13 +223,17 @@ static int alloc_and_load_cp_table(int cp, void *buf)
!(size % (off_t)sizeof (uint16_t))) {
/* if the buffer is provided, use that but don't alloc */
int handle = buf ? 0 : cp_table_alloc(filename, size, &ops);
if (handle > 0)
int handle = buf ? 0 : cp_table_alloc(filename, size, NULL);
if (handle > 0) {
cp_table_pin(handle);
buf = cp_table_get_data(handle);
}
if (buf && read(fd, buf, size) == size) {
close(fd);
cptable_tohw16(buf, size / sizeof (uint16_t));
if (handle > 0)
cp_table_unpin(handle);
return handle;
}