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coroutine: move pooling to common code

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The coroutine pool code is duplicated between the ucontext and
sigaltstack backends, and absent from the win32 backend.  But the
code can be shared easily by moving it to qemu-coroutine.c.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-02-19 11:59:09 +01:00 • committed by Kevin Wolf
parent 4dc9f9d67d
commit 402397843e
3 changed files with 45 additions and 86 deletions
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43
coroutine-sigaltstack.c
View file

@ -33,15 +33,6 @@
#include "qemu-common.h"
#include "block/coroutine_int.h"
enum {
/* Maximum free pool size prevents holding too many freed coroutines */
POOL_MAX_SIZE = 64,
};
/** Free list to speed up creation */
static QSLIST_HEAD(, Coroutine) pool = QSLIST_HEAD_INITIALIZER(pool);
static unsigned int pool_size;
typedef struct {
Coroutine base;
void *stack;
@ -85,17 +76,6 @@ static void qemu_coroutine_thread_cleanup(void *opaque)
g_free(s);
}
static void __attribute__((destructor)) coroutine_cleanup(void)
{
Coroutine *co;
Coroutine *tmp;
QSLIST_FOREACH_SAFE(co, &pool, pool_next, tmp) {
g_free(DO_UPCAST(CoroutineUContext, base, co)->stack);
g_free(co);
}
}
static void __attribute__((constructor)) coroutine_init(void)
{
int ret;
@ -164,7 +144,7 @@ static void coroutine_trampoline(int signal)
coroutine_bootstrap(self, co);
}
static Coroutine *coroutine_new(void)
Coroutine *qemu_coroutine_new(void)
{
const size_t stack_size = 1 << 20;
CoroutineUContext *co;
@ -272,31 +252,10 @@ static Coroutine *coroutine_new(void)
return &co->base;
}
Coroutine *qemu_coroutine_new(void)
{
Coroutine *co;
co = QSLIST_FIRST(&pool);
if (co) {
QSLIST_REMOVE_HEAD(&pool, pool_next);
pool_size--;
} else {
co = coroutine_new();
}
return co;
}
void qemu_coroutine_delete(Coroutine *co_)
{
CoroutineUContext *co = DO_UPCAST(CoroutineUContext, base, co_);
if (pool_size < POOL_MAX_SIZE) {
QSLIST_INSERT_HEAD(&pool, &co->base, pool_next);
co->base.caller = NULL;
pool_size++;
return;
}
g_free(co->stack);
g_free(co);
}