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[stat_cache] FAM: reduce string copying

personal/stbuehler/ci-build
Glenn Strauss 2019-04-25 20:37:02 -04:00
parent a50b72c356
commit cc49703372
1 changed files with 15 additions and 35 deletions
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50
src/stat_cache.c
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@ -107,9 +107,9 @@ static uint32_t hashme(const char *str, const size_t len)
#include <fam.h>
typedef struct {
FAMRequest *req;
buffer *name;
int version;
FAMRequest req;
} fam_dir_entry;
typedef struct stat_cache_fam {
@ -119,7 +119,7 @@ typedef struct stat_cache_fam {
int dir_ndx;
fam_dir_entry *fam_dir;
buffer *dir_name; /* for building the dirname from the filename */
size_t dirlen; /* for building the dirname from the filename */
fdnode *fdn;
int fd;
} stat_cache_fam;
@ -140,11 +140,9 @@ static void fam_dir_entry_free(FAMConnection *fc, void *data) {
if (!fam_dir) return;
FAMCancelMonitor(fc, fam_dir->req);
FAMCancelMonitor(fc, &fam_dir->req);
buffer_free(fam_dir->name);
free(fam_dir->req);
free(fam_dir);
}
@ -216,7 +214,6 @@ static handler_t stat_cache_handle_fdevent(server *srv, void *_fce, int revent)
static stat_cache_fam * stat_cache_init_fam(server *srv) {
stat_cache_fam *scf = calloc(1, sizeof(*scf));
scf->dir_name = buffer_init();
scf->fd = -1;
/* setup FAM */
@ -239,7 +236,6 @@ static stat_cache_fam * stat_cache_init_fam(server *srv) {
static void stat_cache_free_fam(stat_cache_fam *scf) {
if (NULL == scf) return;
buffer_free(scf->dir_name);
while (scf->dirs) {
splay_tree *node = scf->dirs;
@ -256,29 +252,19 @@ static void stat_cache_free_fam(stat_cache_fam *scf) {
free(scf);
}
static int buffer_copy_dirname(buffer *dst, const buffer *file) {
size_t i;
if (buffer_string_is_empty(file)) return -1;
for (i = buffer_string_length(file); i > 0; i--) {
if (file->ptr[i] == '/') {
buffer_copy_string_len(dst, file->ptr, i);
return 0;
}
}
return -1;
}
static handler_t stat_cache_fam_dir_check(server *srv, stat_cache_fam *scf, stat_cache_entry *sce, const buffer *name) {
if (0 != buffer_copy_dirname(scf->dir_name, name)) {
char *slash = !buffer_string_is_empty(name)
? strrchr(name->ptr, '/')
: NULL;
if (NULL == slash) {
log_error_write(srv, __FILE__, __LINE__, "sb",
"no '/' found in filename:", name);
return HANDLER_ERROR;
}
scf->dirlen = (size_t)(slash - name->ptr);
if (0 == scf->dirlen) scf->dirlen = 1; /* root dir ("/") */
scf->dir_ndx = hashme(CONST_BUF_LEN(scf->dir_name));
scf->dir_ndx = hashme(name->ptr, scf->dirlen);
scf->dirs = splaytree_splay(scf->dirs, scf->dir_ndx);
@ -286,7 +272,7 @@ static handler_t stat_cache_fam_dir_check(server *srv, stat_cache_fam *scf, stat
scf->fam_dir = scf->dirs->data;
/* check whether we got a collision */
if (buffer_is_equal(scf->dir_name, scf->fam_dir->name)) {
if (buffer_is_equal_string(scf->fam_dir->name, name->ptr, scf->dirlen)) {
/* test whether a found file cache entry is still ok */
if ((NULL != sce) && (scf->fam_dir->version == sce->dir_version)) {
/* the stat()-cache entry is still ok */
@ -309,15 +295,12 @@ static void stat_cache_fam_dir_monitor(server *srv, stat_cache_fam *scf, stat_ca
if (NULL == fam_dir) {
fam_dir = fam_dir_entry_init();
buffer_copy_buffer(fam_dir->name, scf->dir_name);
buffer_copy_string_len(fam_dir->name, name->ptr, scf->dirlen);
fam_dir->version = 1;
fam_dir->req = calloc(1, sizeof(FAMRequest));
force_assert(NULL != fam_dir);
if (0 != FAMMonitorDirectory(&scf->fam, fam_dir->name->ptr,
fam_dir->req, fam_dir)) {
&fam_dir->req, fam_dir)) {
log_error_write(srv, __FILE__, __LINE__, "sbsbs",
"monitoring dir failed:",
@ -326,7 +309,7 @@ static void stat_cache_fam_dir_monitor(server *srv, stat_cache_fam *scf, stat_ca
FamErrlist[FAMErrno]);
fam_dir_entry_free(&scf->fam, fam_dir);
fam_dir = NULL;
return;
} else {
int osize = splaytree_size(scf->dirs);
@ -347,10 +330,7 @@ static void stat_cache_fam_dir_monitor(server *srv, stat_cache_fam *scf, stat_ca
}
/* bind the fam_fc to the stat() cache entry */
if (fam_dir) {
sce->dir_version = fam_dir->version;
}
sce->dir_version = fam_dir->version;
}
#endif