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lib/posix: correct the meaning of CONFIG_MAX_PTHREAD_COUNT

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Current code implement CONFIG_MAX_PTHREAD_COUNT as the maximum number
of POSIX threads that can ever be created, rather than the maximum
number of active POSIX threads. Use pthread_state of struct posix_thread
to track the state of posix thread in posix_thread_pool so that we can
reuse the unused posix thread.

Fixes #15516.

Signed-off-by: Wentong Wu <wentong.wu@intel.com>
This commit is contained in:
Wentong Wu 2019-05-11 19:43:01 +08:00 • committed by Anas Nashif
commit 6922d93d8e
3 changed files with 21 additions and 10 deletions
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12
include/posix/pthread.h
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@ -18,14 +18,14 @@
#include <string.h>
enum pthread_state {
/* The thread structure is unallocated and available for reuse. */
PTHREAD_TERMINATED = 0,
/* The thread is running and joinable. */
PTHREAD_JOINABLE = 0,
PTHREAD_JOINABLE,
/* The thread is running and detached. */
PTHREAD_DETACHED,
/* A joinable thread exited and its return code is available. */
PTHREAD_EXITED,
/* The thread structure is unallocated and available for reuse. */
PTHREAD_TERMINATED
PTHREAD_EXITED
};
struct posix_thread {
@ -49,8 +49,8 @@ struct posix_thread {
};
/* Pthread detach/joinable */
#define PTHREAD_CREATE_JOINABLE 0
#define PTHREAD_CREATE_DETACHED 1
#define PTHREAD_CREATE_JOINABLE PTHREAD_JOINABLE
#define PTHREAD_CREATE_DETACHED PTHREAD_DETACHED
/* Pthread cancellation */
#define _PTHREAD_CANCEL_POS 0