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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2020 Google, LLC. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "mca_base_alias.h"
#include "opal/class/opal_hash_table.h"
#include "opal/runtime/opal.h"
static void mca_base_alias_init(mca_base_alias_t *alias)
{
OBJ_CONSTRUCT(&alias->component_aliases, opal_list_t);
}
static void mca_base_alias_fini(mca_base_alias_t *alias)
{
OPAL_LIST_DESTRUCT(&alias->component_aliases);
}
OBJ_CLASS_INSTANCE(mca_base_alias_t, opal_object_t, mca_base_alias_init, mca_base_alias_fini);
static void mca_base_alias_item_init(mca_base_alias_item_t *alias_item)
{
alias_item->component_alias = NULL;
}
static void mca_base_alias_item_fini(mca_base_alias_item_t *alias_item)
{
free(alias_item->component_alias);
}
OBJ_CLASS_INSTANCE(mca_base_alias_item_t, opal_list_item_t, mca_base_alias_item_init,
mca_base_alias_item_fini);
/*
* local variables
*/
static opal_hash_table_t *alias_hash_table;
static void mca_base_alias_cleanup(void)
{
if (!alias_hash_table) {
return;
}
void *key;
opal_object_t *value;
OPAL_HASH_TABLE_FOREACH_PTR (key, value, alias_hash_table, { OBJ_RELEASE(value); })
;
OBJ_RELEASE(alias_hash_table);
alias_hash_table = NULL;
}
static int mca_base_alias_setup(void)
{
if (NULL != alias_hash_table) {
return OPAL_SUCCESS;
}
opal_finalize_register_cleanup(mca_base_alias_cleanup);
alias_hash_table = OBJ_NEW(opal_hash_table_t);
if (NULL == alias_hash_table) {
return OPAL_ERR_OUT_OF_RESOURCE;
}
int ret = opal_hash_table_init(alias_hash_table, 32);
if (OPAL_SUCCESS != ret) {
OBJ_RELEASE(alias_hash_table);
alias_hash_table = NULL;
return ret;
}
return OPAL_SUCCESS;
}
static char *mca_base_alias_generate_name(const char *project, const char *framework,
const char *component_name)
{
size_t project_length = project ? strlen(project) : 0;
size_t framework_length = framework ? strlen(framework) : 0;
size_t component_name_length = strlen(component_name);
size_t length = project_length + framework_length + component_name_length + 2;
char *tmp = calloc(1, length + 1);
if (NULL == tmp) {
return tmp;
}
if (project_length) {
strncat(tmp, project, length);
// NOTE: We use strcat() here (and not strncat()) because
// we're appending a constant string with a fixed/hard-coded
// length. It's the exact equivalent of strncat(tmp, "_", 1),
// but strncat() would actually be more overhead. Indeed, GCC
// 10 emits a warning if we use strncatd() with a compile-time
// constant string as the source and a hard-coded length that
// is equivalent to the length of that compile-time constant
// string. So avoid the warning and use strcat().
strcat(tmp, "_");
length -= project_length + 1;
}
if (framework_length) {
strncat(tmp, framework, length);
// Use strcat() here instead of strncat(); see the comment
// above for an explanation.
strcat(tmp, "_");
length -= framework_length + 1;
}
strncat(tmp, component_name, length);
return tmp;
}
static mca_base_alias_t *mca_base_alias_lookup_internal(const char *name)
{
mca_base_alias_t *alias = NULL;
if (NULL == alias_hash_table) {
return NULL;
}
(void) opal_hash_table_get_value_ptr(alias_hash_table, name, strlen(name), (void **) &alias);
return alias;
}
int mca_base_alias_register(const char *project, const char *framework, const char *component_name,
const char *component_alias, uint32_t alias_flags)
{
if (NULL == component_name) {
return OPAL_ERR_BAD_PARAM;
}
int ret = mca_base_alias_setup();
if (OPAL_SUCCESS != ret) {
return ret;
}
char *name = mca_base_alias_generate_name(project, framework, component_name);
assert(NULL != name);
mca_base_alias_t *alias = mca_base_alias_lookup_internal(name);
if (NULL == alias) {
alias = OBJ_NEW(mca_base_alias_t);
if (NULL == alias) {
free(name);
return OPAL_ERR_OUT_OF_RESOURCE;
}
opal_hash_table_set_value_ptr(alias_hash_table, name, strlen(name), alias);
free(name);
name = NULL;
}
mca_base_alias_item_t *alias_item = OBJ_NEW(mca_base_alias_item_t);
if (NULL == alias_item) {
free(name);
return OPAL_ERR_OUT_OF_RESOURCE;
}
alias_item->component_alias = strdup(component_alias);
alias_item->alias_flags = alias_flags;
opal_list_append(&alias->component_aliases, &alias_item->super);
free(name);
return OPAL_SUCCESS;
}
const mca_base_alias_t *mca_base_alias_lookup(const char *project, const char *framework,
const char *component_name)
{
if (NULL == component_name) {
return NULL;
}
char *name = mca_base_alias_generate_name(project, framework, component_name);
assert(NULL != name);
const mca_base_alias_t *alias = mca_base_alias_lookup_internal(name);
free(name);
return alias;
}
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