helper: linux: deprecate process fork and join functions

Deprecate unused odph_linux_process_fork(), odph_linux_process_fork_n(),
and odph_linux_process_wait_n() functions which have been replaced by
generic odph_thread_create() and odph_thread_join() functions.

Signed-off-by: Matias Elo <matias.elo@nokia.com>

doc/implementers-guide/implementers-guide.adoc

@@ -563,21 +563,6 @@ In the linux helper, two functions are given to create and join ODP threads:
 These two functions abstract what an ODP thread really is and their usage
 is recommended as they would be implemented in other OS`s helper lib.
 
-Five older functions exist to tie and ODP thread to a specific implementation:
-
-`odph_linux_pthread_create()`
-
-`odph_linux_pthread_join()`
-
-`odph_linux_process_fork_n()`
-
-`odph_linux_process_fork()`
-
-`odph_linux_process_wait_n()`
-
-The usage of these functions should not occur within ODP examples nor tests.
-The usage of these functions in other application is not recommended.
-
 [[typedefs]]
 == ODP Abstract Types and Implementation Typedefs
 ODP APIs are defined to be abstract and operate on abstract types. For example,

helper/include/odp/helper/linux/process.h

@@ -15,6 +15,7 @@
 #ifndef ODPH_LINUX_PROCESS_H_
 #define ODPH_LINUX_PROCESS_H_
 
+#include <odp/helper/deprecated.h>
 #include <odp/helper/threads.h>
 #include <odp_api.h>
 
@@ -39,9 +40,11 @@ extern "C" {
  *
  * @return On success: 1 for the parent, 0 for the child
  *         On failure: -1 for the parent, -2 for the child
+ *
+ * @deprecated Use odph_thread_create() instead.
  */
-int odph_linux_process_fork(odph_linux_process_t *proc, int cpu,
-			    const odph_linux_thr_params_t *thr_params);
+int ODPH_DEPRECATE(odph_linux_process_fork)(odph_linux_process_t *proc, int cpu,
+					    const odph_linux_thr_params_t *thr_params);
 
 /**
  * Fork a number of processes
@@ -55,10 +58,12 @@ int odph_linux_process_fork(odph_linux_process_t *proc, int cpu,
  *
  * @return On success: 1 for the parent, 0 for the child
  *         On failure: -1 for the parent, -2 for the child
+ *
+ * @deprecated Use odph_thread_create() instead.
  */
-int odph_linux_process_fork_n(odph_linux_process_t *proc_tbl,
-			      const odp_cpumask_t *mask,
-			      const odph_linux_thr_params_t *thr_params);
+int ODPH_DEPRECATE(odph_linux_process_fork_n)(odph_linux_process_t *proc_tbl,
+					      const odp_cpumask_t *mask,
+					      const odph_linux_thr_params_t *thr_params);
 
 /**
  * Wait for a number of processes
@@ -70,8 +75,10 @@ int odph_linux_process_fork_n(odph_linux_process_t *proc_tbl,
  * @param num           Number of processes to wait
  *
  * @return 0 on success, -1 on failure
+ *
+ * @deprecated Use odph_thread_join() instead.
  */
-int odph_linux_process_wait_n(odph_linux_process_t *proc_tbl, int num);
+int ODPH_DEPRECATE(odph_linux_process_wait_n)(odph_linux_process_t *proc_tbl, int num);
 
 /**
  * @}

helper/linux/thread.c

@@ -115,9 +115,9 @@ void ODPH_DEPRECATE(odph_linux_pthread_join)(odph_linux_pthread_t *thread_tbl, i
 	}
 }
 
-int odph_linux_process_fork_n(odph_linux_process_t *proc_tbl,
-			      const odp_cpumask_t *mask,
-			      const odph_linux_thr_params_t *thr_params)
+int ODPH_DEPRECATE(odph_linux_process_fork_n)(odph_linux_process_t *proc_tbl,
+					      const odp_cpumask_t *mask,
+					      const odph_linux_thr_params_t *thr_params)
 {
 	pid_t pid;
 	int num;
@@ -184,17 +184,17 @@ int odph_linux_process_fork_n(odph_linux_process_t *proc_tbl,
 	return 1;
 }
 
-int odph_linux_process_fork(odph_linux_process_t *proc, int cpu,
-			    const odph_linux_thr_params_t *thr_params)
+int ODPH_DEPRECATE(odph_linux_process_fork)(odph_linux_process_t *proc, int cpu,
+					    const odph_linux_thr_params_t *thr_params)
 {
 	odp_cpumask_t mask;
 
 	odp_cpumask_zero(&mask);
 	odp_cpumask_set(&mask, cpu);
-	return odph_linux_process_fork_n(proc, &mask, thr_params);
+	return ODPH_DEPRECATE(odph_linux_process_fork_n)(proc, &mask, thr_params);
 }
 
-int odph_linux_process_wait_n(odph_linux_process_t *proc_tbl, int num)
+int ODPH_DEPRECATE(odph_linux_process_wait_n)(odph_linux_process_t *proc_tbl, int num)
 {
 	pid_t pid;
 	int i, j;

helper/test/linux/process.c

@@ -70,7 +70,7 @@ int main(int argc ODP_UNUSED, char *argv[] ODP_UNUSED)
 	thr_params.instance = instance;
 
 	/* Fork worker processes */
-	ret = odph_linux_process_fork_n(proc, &cpu_mask, &thr_params);
+	ret = ODPH_DEPRECATE(odph_linux_process_fork_n)(proc, &cpu_mask, &thr_params);
 
 	if (ret < 0) {
 		ODPH_ERR("Fork workers failed %i\n", ret);
@@ -87,7 +87,7 @@ int main(int argc ODP_UNUSED, char *argv[] ODP_UNUSED)
 		}
 	} else {
 		/* Parent process */
-		odph_linux_process_wait_n(proc, num_workers);
+		ODPH_DEPRECATE(odph_linux_process_wait_n)(proc, num_workers);
 
 		if (odp_term_local()) {
 			ODPH_ERR("Error: ODP local term failed.\n");