From: Narcisa Vasile <navas...@microsoft.com>
Use a portable, type-safe representation for the thread identifier.
Add functions for comparing thread ids and obtaining the thread id
for the current thread.
Signed-off-by: Narcisa Vasile <navas...@microsoft.com>
---
lib/eal/common/meson.build | 1 +
lib/eal/{unix => common}/rte_thread.c | 57 ++++++++++++++++-----------
lib/eal/include/rte_thread.h | 48 +++++++++++++++++-----
lib/eal/unix/meson.build | 1 -
lib/eal/version.map | 3 ++
lib/eal/windows/rte_thread.c | 17 ++++++++
6 files changed, 95 insertions(+), 32 deletions(-)
rename lib/eal/{unix => common}/rte_thread.c (66%)
diff --git a/lib/eal/common/meson.build b/lib/eal/common/meson.build
index edfca77779..eda250247b 100644
--- a/lib/eal/common/meson.build
+++ b/lib/eal/common/meson.build
@@ -80,6 +80,7 @@ sources += files(
'rte_random.c',
'rte_reciprocal.c',
'rte_service.c',
+ 'rte_thread.c',
'rte_version.c',
)
diff --git a/lib/eal/unix/rte_thread.c b/lib/eal/common/rte_thread.c
similarity index 66%
rename from lib/eal/unix/rte_thread.c
rename to lib/eal/common/rte_thread.c
index c72d619ec1..92a7451b0a 100644
--- a/lib/eal/unix/rte_thread.c
+++ b/lib/eal/common/rte_thread.c
@@ -1,5 +1,6 @@
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2021 Mellanox Technologies, Ltd
+ * Copyright(c) 2021 Microsoft Corporation
*/
#include <errno.h>
@@ -16,25 +17,41 @@ struct eal_tls_key {
pthread_key_t thread_index;
};
+rte_thread_t
+rte_thread_self(void)
+{
+ rte_thread_t thread_id;
+
+ thread_id.opaque_id = (uintptr_t)pthread_self();
+
+ return thread_id;
+}
+
+int
+rte_thread_equal(rte_thread_t t1, rte_thread_t t2)
+{
+ return pthread_equal((pthread_t)t1.opaque_id, (pthread_t)t2.opaque_id);
+}
+
int
rte_thread_key_create(rte_thread_key *key, void (*destructor)(void *))
{
int err;
+ rte_thread_key k;
- *key = malloc(sizeof(**key));
- if ((*key) == NULL) {
+ k = malloc(sizeof(*k));
+ if (k == NULL) {
RTE_LOG(DEBUG, EAL, "Cannot allocate TLS key.\n");
- rte_errno = ENOMEM;
- return -1;
+ return EINVAL;
}
- err = pthread_key_create(&((*key)->thread_index), destructor);
- if (err) {
+ err = pthread_key_create(&(k->thread_index), destructor);
+ if (err != 0) {
RTE_LOG(DEBUG, EAL, "pthread_key_create failed: %s\n",
strerror(err));
- free(*key);
- rte_errno = ENOEXEC;
- return -1;
+ free(k);
+ return err;
}
+ *key = k;
return 0;
}
@@ -43,18 +60,16 @@ rte_thread_key_delete(rte_thread_key key)
{
int err;
- if (!key) {
+ if (key == NULL) {
RTE_LOG(DEBUG, EAL, "Invalid TLS key.\n");
- rte_errno = EINVAL;
- return -1;
+ return EINVAL;
}
err = pthread_key_delete(key->thread_index);
- if (err) {
+ if (err != 0) {
RTE_LOG(DEBUG, EAL, "pthread_key_delete failed: %s\n",
strerror(err));
free(key);
- rte_errno = ENOEXEC;
- return -1;
+ return err;
}
free(key);
return 0;
@@ -65,17 +80,15 @@ rte_thread_value_set(rte_thread_key key, const void *value)
{
int err;
- if (!key) {
+ if (key == NULL) {
RTE_LOG(DEBUG, EAL, "Invalid TLS key.\n");
- rte_errno = EINVAL;
- return -1;
+ return EINVAL;
}
err = pthread_setspecific(key->thread_index, value);
- if (err) {
+ if (err != 0) {
RTE_LOG(DEBUG, EAL, "pthread_setspecific failed: %s\n",
strerror(err));
- rte_errno = ENOEXEC;
- return -1;
+ return err;
}
return 0;
}
@@ -83,7 +96,7 @@ rte_thread_value_set(rte_thread_key key, const void *value)
void *
rte_thread_value_get(rte_thread_key key)
{
- if (!key) {
+ if (key == NULL) {
RTE_LOG(DEBUG, EAL, "Invalid TLS key.\n");
rte_errno = EINVAL;
return NULL;
diff --git a/lib/eal/include/rte_thread.h b/lib/eal/include/rte_thread.h
index 8be8ed8f36..748f64d230 100644
--- a/lib/eal/include/rte_thread.h
+++ b/lib/eal/include/rte_thread.h
@@ -1,6 +1,8 @@
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2021 Mellanox Technologies, Ltd
+ * Copyright(c) 2021 Microsoft Corporation
*/
+#include <stdint.h>
#include <rte_os.h>
#include <rte_compat.h>
@@ -20,11 +22,45 @@
extern "C" {
#endif
+#include <sched.h>
+
+/**
+ * Thread id descriptor.
+ */
+typedef struct rte_thread_tag {
+ uintptr_t opaque_id; /**< thread identifier */
+} rte_thread_t;
+
/**
* TLS key type, an opaque pointer.
*/
typedef struct eal_tls_key *rte_thread_key;
+/**
+ * Get the id of the calling thread.
+ *
+ * @return
+ * Return the thread id of the calling thread.
+ */
+__rte_experimental
+rte_thread_t rte_thread_self(void);
+
+/**
+ * Check if 2 thread ids are equal.
+ *
+ * @param t1
+ * First thread id.
+ *
+ * @param t2
+ * Second thread id.
+ *
+ * @return
+ * If the ids are equal, return nonzero.
+ * Otherwise, return 0.
+ */
+__rte_experimental
+int rte_thread_equal(rte_thread_t t1, rte_thread_t t2);
+
#ifdef RTE_HAS_CPUSET
/**
@@ -63,9 +99,7 @@ void rte_thread_get_affinity(rte_cpuset_t *cpusetp);
*
* @return
* On success, zero.
- * On failure, a negative number and an error number is set in rte_errno.
- * rte_errno can be: ENOMEM - Memory allocation error.
- * ENOEXEC - Specific OS error.
+ * On failure, return a positive errno-style error number.
*/
__rte_experimental
@@ -80,9 +114,7 @@ int rte_thread_key_create(rte_thread_key *key,
*
* @return
* On success, zero.
- * On failure, a negative number and an error number is set in rte_errno.
- * rte_errno can be: EINVAL - Invalid parameter passed.
- * ENOEXEC - Specific OS error.
+ * On failure, return a positive errno-style error number.
*/
__rte_experimental
int rte_thread_key_delete(rte_thread_key key);
@@ -97,9 +129,7 @@ int rte_thread_key_delete(rte_thread_key key);
*
* @return
* On success, zero.
- * On failure, a negative number and an error number is set in rte_errno.
- * rte_errno can be: EINVAL - Invalid parameter passed.
- * ENOEXEC - Specific OS error.
+ * On failure, return a positive errno-style error number.
*/
__rte_experimental
int rte_thread_value_set(rte_thread_key key, const void *value);
diff --git a/lib/eal/unix/meson.build b/lib/eal/unix/meson.build
index e3ecd3e956..cb6d233721 100644
--- a/lib/eal/unix/meson.build
+++ b/lib/eal/unix/meson.build
@@ -6,5 +6,4 @@ sources += files(
'eal_unix_memory.c',
'eal_unix_timer.c',
'eal_firmware.c',
- 'rte_thread.c',
)
diff --git a/lib/eal/version.map b/lib/eal/version.map
index 887012d02a..ba7dcda664 100644
--- a/lib/eal/version.map
+++ b/lib/eal/version.map
@@ -426,6 +426,9 @@ EXPERIMENTAL {
# added in 21.08
rte_power_monitor_multi; # WINDOWS_NO_EXPORT
+
+ rte_thread_self;
+ rte_thread_equal;
};
INTERNAL {
diff --git a/lib/eal/windows/rte_thread.c b/lib/eal/windows/rte_thread.c
index 667287c387..41c354818b 100644
--- a/lib/eal/windows/rte_thread.c
+++ b/lib/eal/windows/rte_thread.c
@@ -1,5 +1,6 @@
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2021 Mellanox Technologies, Ltd
+ * Copyright(c) 2021 Microsoft Corporation
*/
#include <rte_common.h>
@@ -11,6 +12,22 @@ struct eal_tls_key {
DWORD thread_index;
};
+rte_thread_t
+rte_thread_self(void)
+{
+ rte_thread_t thread_id;
+
+ thread_id.opaque_id = GetCurrentThreadId();
+
+ return thread_id;
+}
+
+int
+rte_thread_equal(rte_thread_t t1, rte_thread_t t2)
+{
+ return t1.opaque_id == t2.opaque_id;
+}
+
int
rte_thread_key_create(rte_thread_key *key,
__rte_unused void (*destructor)(void *))
--
2.31.0.vfs.0.1
